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1

Matlab modeling of ITER CODAC  

Science Journals Connector (OSTI)

The ITER CODAC (COntrol, Data Access and Communication) conceptual design resulted from 2 years of activity. One result was a proposed functional partitioning of CODAC into different CODAC Systems, each of them partitioned into other CODAC Systems. Considering the large size of this project, simple use of human language assisted by figures would certainly be ineffective in creating an unambiguous description of all interactions and all relations between these Systems. Moreover, the underlying design is resident in the mind of the designers, who must consider all possible situations that could happen to each system. There is therefore a need to model the whole of CODAC with a clear and preferably graphical method, which allows the designers to verify the correctness and the consistency of their project. The aim of this paper is to describe the work started on ITER CODAC modeling using Matlab/Simulink. The main feature of this tool is the possibility of having a simple, graphical, intuitive representation of a complex system and ultimately to run a numerical simulation of it. Using Matlab/Simulink, each CODAC System was represented in a graphical and intuitive form with its relations and interactions through the definition of a small number of simple rules. In a Simulink diagram, each system was represented as a “black box”, both containing, and connected to, a number of other systems. In this way it is possible to move vertically between systems on different levels, to show the relation of membership, or horizontally to analyse the information exchange between systems at the same level. This process can be iterated, starting from a global diagram, in which only CODAC appears with the Plant Systems and the external sites, and going deeper down to the mathematical model of each CODAC system. The Matlab/Simulink features for simulating the whole top diagram encourage us to develop the idea of completing the functionalities of all systems in order to finally have a full simulation of ITER CODAC.

L. Pangione; J.B. Lister

2008-01-01T23:59:59.000Z

2

Cryogenic system for ITER CS model coil  

SciTech Connect (OSTI)

A 5-kW/4.5-K helium refrigerator has been developed, which will be used for the test of ITER Central Solenoid Model Coil that is under fabrication by an international collaboration under the framework of the ITER Engineering Design Activity. Its acceptance test was recently finished and its specified refrigeration power of 5 kW with a surplus liquefaction rate of 114 1/h was demonstrated. A major feature of the refrigerator is that newly developed components, such as helium compressor and turbo-expander, are adopted in its simple refrigeration process in order that the results will be transferred to the ITER helium cryogenic system.

Kato, T.; Hamada, K.; Kawano, K.; Hiyama, T. [JAERI, Naka Fusion Research Establishment, Nada-machi, Nada-gun, Ibaraki-ken (Japan)] [and others

1996-12-31T23:59:59.000Z

3

Modeling of Hydrogen Line Shapes for the Diagnostic of ITER  

SciTech Connect (OSTI)

The state of art of the line shape modeling techniques involved in tokamak edge plasma spectroscopy is reported, in the context of the preparation for ITER. Hydrogen spectra are calculated assuming a line-of-sight crossing a 2D-plasma background obtained from numerical simulations. The Doppler, Zeeman and Stark effects are retained. Ion dynamics effects are accounted for by using the numerical simulation method. The possibility for a line shape-based diagnostic of the ITER divertor plasma is examined through fittings of simulated spectra and comparison with the input plasma fields.

Rosato, J.; Capes, H.; Godbert-Mouret, L.; Koubiti, M.; Marandet, Y.; Stamm, R. [PIIM, UMR 6633 Universite de Provence / CNRS, Centre de St-Jerome, Case 232, F-13397 Marseille Cedex 20 (France); Kotov, V.; Reiter, D. [IEF-Plasmaphysik, Forschungszentrum Juelich GmbH, Euratom Association, Trilateral Euregio Cluster, D-52425 Juelich (Germany)

2010-10-29T23:59:59.000Z

4

ITER  

SciTech Connect (OSTI)

This year six international partners have signed up to construct the first burning plasma experiment -- ITER -- in the South of France.It is over 50 years since the beginning of national programs to produce controlled fusion energy. The challenge of fusion energy has proven harder than was first anticipated. In this Colloquium Steve Cowley from UCLA will explain the scientific issues and how the difficulties have been overcome.

Cowley, Steve

2005-10-10T23:59:59.000Z

5

Nested Loop Algorithm for Parallel Model Based Iterative Reconstruction  

E-Print Network [OSTI]

Nested Loop Algorithm for Parallel Model Based Iterative Reconstruction Zhou Yu, Lin Fu, Debashish. In this paper, we propose a fast converging simultaneous-update algorithm using a nested loop structure tomography, iterative reconstruction, nested loop, preconditioner. I. INTRODUCTION Recent applications

6

Accelerated Iterative Method for Solving Steady Solutions of Linearized Atmospheric Models  

E-Print Network [OSTI]

Accelerated Iterative Method for Solving Steady Solutions of Linearized Atmospheric Models Masahiro approach, referred to as the accelerated iterative method (AIM), is developed for solving steady state, respectively. For ensuring the accelerated asymptotic convergence of iterative procedure

Watanabe, Masahiro

7

STELLOPT Modeling of the 3D Diagnostic Response in ITER  

SciTech Connect (OSTI)

The ITER three dimensional diagnostic response to an n=3 resonant magnetic perturbation is modeled using the STELLOPT code. The in-vessel coils apply a resonant magnetic perturbation (RMP) fi eld which generates a 4 cm edge displacement from axisymmetry as modeled by the VMEC 3D equilibrium code. Forward modeling of flux loop and magnetic probe response with the DIAGNO code indicates up to 20 % changes in measured plasma signals. Simulated LIDAR measurements of electron temperature indicate 2 cm shifts on the low field side of the plasma. This suggests that the ITER diagnostic will be able to diagnose the 3D structure of the equilibria.

Lazerson, Samuel A

2013-05-07T23:59:59.000Z

8

US ITER | Media Corner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

US ITER College Student Models, Simulates and Designs a Cooling Subsystem for the ITER Tokamak -Agatha Bardoel Published June 24, 2011 US ITER Project Manger Ned Sauthoff and ITER...

9

Ab initio modeling of small proteins by iterative TASSER simulations  

E-Print Network [OSTI]

(< 120 residues) were used. I-TASSER folded four of them with a C?-RMSD < 2.5Ĺ. The average C?-RMSD of the I-TASSER models was 3.9Ĺ, whereas it was 5.9Ĺ using TOUCHSTONE-II software. Finally, 20 non-homologous small proteins (< 120 residues) were taken...

Wu, Sitao; Skolnick, Jeffrey; Zhang, Yang

2007-05-08T23:59:59.000Z

10

Modeling an Unmitigated Quench Event in an ITER Toroidal Field Magnet  

SciTech Connect (OSTI)

An unmitigated quench of a toroidal field (TF) magnet has been proposed as an extremely unlikely event for International Thermonuclear Experimental Reactor (ITER) Engineering Design Activity safety analysis. While the frequency of such an event is highly improbable (<1 x 10{sup -6}/yr), the public safety consequences of this event must be explored because the TF magnets are located midway between the two primary confinement barriers of the ITER design. These confinement barriers are the vacuum vessel (VV) and the cryostat. An unmitigated quench has the potential for producing melting of the magnet. If molten material from the magnet were to impinge on the walls of the VV and cryostat, these walls could fail, resulting in a pathway for release of radioactive material to the environment from the VV. A model has been developed at the Idaho National Engineering and Environmental Laboratory called MAGARC to investigate the consequences of this accident. This model is described in detail, and results from this model used in ITER safety analysis are presented.

Merrill, Brad J. [Idaho National Engineering and Environmental Laboratory (United States)

2000-05-15T23:59:59.000Z

11

Modeling an unmitigated quench event in an ITER torodial field magnet  

SciTech Connect (OSTI)

An unmitigated quench of a toroidal field (TF) magnet has been proposed as an extremely unlikely event for International Thermonuclear Experimental Reactor (ITER) Engineering Design Activity safety analysis. While the frequency of such an event is highly improbable (<1 x 10{sup {minus}6}/yr), the public safety consequences of this event must be explored because the TF magnets are located midway between the two primary confinement barriers of the ITER design. These confinement barriers are the vacuum vessel (VV) and the cryostat. An unmitigated quench has the potential for producing melting of the magnet. If molten material from the magnet were to impinge on the walls of the VV and cryostat, these walls could fail, resulting in a pathway for release of radioactive material to the environment from the VV. A model has been developed in the Idaho National Engineering and Environmental Laboratory called MAGARC to investigate the consequences of this accident. This model is described in detail, and results from this model used in ITER safety analysis are presented.

Merrill, B.J.

2000-05-01T23:59:59.000Z

12

Coupling characteristics of the ITER relevant lower hybrid antenna in Tore Supra: experiments and modelling  

SciTech Connect (OSTI)

A new concept of lower hybrid antenna for current drive has been proposed for ITER [Bibet et al, Nuclear Fusion 1995]: the Passive Active Multijunction (PAM) antenna that relies on a periodic combination of active and passive waveguides. An actively cooled PAM antenna at 3.7 GHz has been recently installed on the tokamak Tore Supra. The paper summarizes the comprehensive experimental characterization of the linear coupling properties of the PAM antenna to the Tore Supra plasmas. These experimental results are systematically compared with the linear wave coupling theory via the linear ALOHA code. Good agreement between experimental results and ALOHA have been obtained. The detailed validation of the coupling modelling is an important step toward the validation of the PAM concept in view of further optimizing the electromagnetic properties of the future ITER antenna.

Preynas, M.; Ekedahl, A.; Fedorczak, N.; Goniche, M.; Guilhem, D.; Gunn, J. P.; Hillairet, J.; Litaudon, X. [CEA, IRFM, 13108 Saint Paul lez Durance (France); Associacao Euratom-IST, Centro de Fusao Nuclear 1049-001 Lisboa (Portugal)

2011-12-23T23:59:59.000Z

13

Integrated modelling of steady-state scenarios and heating and current drive mixes for ITER  

Science Journals Connector (OSTI)

Recent progress on ITER steady-state (SS) scenario modelling by the ITPA-IOS group is reviewed. Code-to-code benchmarks as the IOS group's common activities for the two SS scenarios (weak shear scenario and internal transport barrier scenario) are discussed in terms of transport, kinetic profiles, and heating and current drive (CD) sources using various transport codes. Weak magnetic shear scenarios integrate the plasma core and edge by combining a theory-based transport model (GLF23) with scaled experimental boundary profiles. The edge profiles (at normalized radius ? = 0.8–1.0) are adopted from an edge-localized mode-averaged analysis of a DIII-D ITER demonstration discharge. A fully noninductive SS scenario is achieved with fusion gain Q = 4.3, noninductive fraction fNI = 100%, bootstrap current fraction fBS = 63% and normalized beta ?N = 2.7 at plasma current Ip = 8?MA and toroidal field BT = 5.3?T using ITER day-1 heating and CD capability. Substantial uncertainties come from outside the radius of setting the boundary conditions (? = 0.8). The present simulation assumed that ?N (?) at the top of the pedestal (? = 0.91) is about 25% above the peeling–ballooning threshold. ITER will have a challenge to achieve the boundary, considering different operating conditions (Te/Ti ? 1 and density peaking). Overall, the experimentally scaled edge is an optimistic side of the prediction. A number of SS scenarios with different heating and CD mixes in a wide range of conditions were explored by exploiting the weak-shear steady-state solution procedure with the GLF23 transport model and the scaled experimental edge. The results are also presented in the operation space for DT neutron power versus stationary burn pulse duration with assumed poloidal flux availability at the beginning of stationary burn, indicating that the long pulse operation goal (3000?s) at Ip = 9?MA is possible. Source calculations in these simulations have been revised for electron cyclotron current drive including parallel momentum conservation effects and for neutral beam current drive with finite orbit and magnetic pitch effects.

M. Murakami; J.M. Park; G. Giruzzi; J. Garcia; P. Bonoli; R.V. Budny; E.J. Doyle; A. Fukuyama; N. Hayashi; M. Honda; A. Hubbard; S. Ide; F. Imbeaux; E.F. Jaeger; T.C. Luce; Y.-S. Na; T. Oikawa; T.H. Osborne; V. Parail; A. Polevoi; R. Prater; A.C.C. Sips; J. Snipes; H.E. St. John; P.B. Snyder; I. Voitsekhovitch; ITPA/Integrated Operation Scenario Group

2011-01-01T23:59:59.000Z

14

US ITER | Jobs  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Postings Careers in Fusion Science ITER Jobs Home > Jobs > US ITER Positions US ITER Positions US...

15

Data augmentation for a Bayesian spatial model involving censored observations  

E-Print Network [OSTI]

Data augmentation for a Bayesian spatial model involving censored observations Brooke L Fridley1 (fax) 1 #12;SUMMARY Spatial environmental data sometimes include below detection limit observations (i. We develop a measurement error Bayesian spatial model for the analysis of spatial data with censored

16

AMPERE 2011, Toulouse Modeling -372 An Iterative Routine for Macroscopic Modeling of  

E-Print Network [OSTI]

. The developed approach involves two software packages: QuickWave-3D, a simulator that uses the conformal finite for energy savings and faster processing of ceramic and metallic powders. The main benefit in comparison. This paper addresses the problem of numerical simulation of micro- wave sintering at a macroscopic scale

Yakovlev, Vadim

17

US ITER | Jobs  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Postings Careers in Fusion Science ITER Jobs Home > Jobs > International Job Postings International ITER Postions International...

18

Implementation of the Iterative Proportion Fitting Algorithm for Geostatistical Facies Modeling  

SciTech Connect (OSTI)

In geostatistics, most stochastic algorithm for simulation of categorical variables such as facies or rock types require a conditional probability distribution. The multivariate probability distribution of all the grouped locations including the unsampled location permits calculation of the conditional probability directly based on its definition. In this article, the iterative proportion fitting (IPF) algorithm is implemented to infer this multivariate probability. Using the IPF algorithm, the multivariate probability is obtained by iterative modification to an initial estimated multivariate probability using lower order bivariate probabilities as constraints. The imposed bivariate marginal probabilities are inferred from profiles along drill holes or wells. In the IPF process, a sparse matrix is used to calculate the marginal probabilities from the multivariate probability, which makes the iterative fitting more tractable and practical. This algorithm can be extended to higher order marginal probability constraints as used in multiple point statistics. The theoretical framework is developed and illustrated with estimation and simulation example.

Li Yupeng, E-mail: yupeng@ualberta.ca; Deutsch, Clayton V. [University of Alberta (Canada)

2012-06-15T23:59:59.000Z

19

Policy Iteration / Optimistic Policy Iteration Least-Squares Policy Iteration Experiments Least Squares Policy Iteration  

E-Print Network [OSTI]

Policy Iteration / Optimistic Policy Iteration Least-Squares Policy Iteration Experiments Least Squares Policy Iteration Bias-Variance Trade-o in Control Problems Christophe Thiéry and Bruno Scherrer/27 #12; Policy Iteration / Optimistic Policy Iteration Least-Squares Policy Iteration Experiments Markov

Scherrer, Bruno

20

Models for source term, flow, transport and dose assessment in NRC`s Iterative Performance Assessment, Phase 2  

SciTech Connect (OSTI)

The core consequence modules for the recently completed Phase 2 Iterative Performance Assessment (IPA) of the Yucca Mountain repository for high-level nuclear waste depend on models for releases from the engineered barrier system (source term), flow of liquid and gas, transport of radionuclides in the geosphere and assessment of dose to target populations. The source term model includes temperature and moisture phenomena in the near-field environment, general, pitting and crevice corrosion, contact of the waste form by water, dissolution and oxidation of the waste form, and transport of dissolved and gaseous radionuclides from the waste package by advection and diffusion. The liquid flow and transport models describe water flow through fractures and matrix in both the unsaturated and saturated zones. Models for flow of gas and transport of {sup 14}CO{sub 2} released from the engineered barrier system to the atmosphere take into account repository heat and the geothermal gradient. The dose assessment model calculates doses to a regional population and a farm family for an assumed reference biosphere in the vicinity of the repository. The Phase 2 IPA led to a number of suggestions for model improvement: (1) improve the ability of the models to include spatial and temporal variability in the parameters; (2) improve the coupling among processes, especially the effects of changing environments in the waste packages; (3) develop more mechanistic models, but abstracted for use in total system performance assessment; and (4) use more site specific parameters, especially for the dose assessments.

McCartin, T.; Codell, R.; Neel, R.; Ford, W.; Wescott, R.; Bradbury, J. [Nuclear Regulatory Commission, Washington, DC (United States); Sagar, B.; Walton, J. [Center for Nuclear Waste Regulatory Analyses, San Antonio, TX (United States)

1994-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Current generation by helicons and lower hybrid waves in modern tokamaks and reactors ITER and DEMO. Scenarios, modeling and antennae  

SciTech Connect (OSTI)

The innovative concept and 3D full-wave code modeling the off-axis current drive by radio-frequency (RF) waves in large-scale tokamaks, ITER and DEMO, for steady-state operation with high efficiency is proposed. The scheme uses the helicon radiation (fast magnetosonic waves at high (20-40) ion cyclotron frequency harmonics) at frequencies of 500-700 MHz propagating in the outer regions of the plasmas with a rotational transform. It is expected that the current generated by helicons, in conjunction with the bootstrap current, ensure the maintenance of a given value of the total current in the stability margin q(0) {>=} 2 and q(a) {>=} 4, and will help to have regimes with a negative magnetic shear and internal transport barrier to ensure stability at high normalized plasma pressure {beta}{sub N} > 3 (the so-called advanced scenarios) of interest for the commercial reactor. Modeling with full-wave three-dimensional codes PSTELION and STELEC showed flexible control of the current profile in the reactor plasmas of ITER and DEMO, using multiple frequencies, the positions of the antennae and toroidal wave slow down. Also presented are the results of simulations of current generation by helicons in the DIII-D, T-15MD, and JT-60AS tokamaks. Commercially available continuous-wave klystrons of the MW/tube range are promising for commercial stationary fusion reactors. The compact antennae of the waveguide type are proposed, and an example of a possible RF system for today's tokamaks is given. The advantages of the scheme (partially tested at lower frequencies in tokamaks) are a significant decline in the role of parametric instabilities in the plasma periphery, the use of electrically strong resonator-waveguide type antennae, and substantially greater antenna-plasma coupling.

Vdovin, V. L., E-mail: vdov@nfi.kiae.ru [National Research Centre 'Kurchatov Institute,' (Russian Federation)

2013-02-15T23:59:59.000Z

22

Development of a realistic photonic modeling for the evaluation of infrared reflections in the metallic environment of ITER  

SciTech Connect (OSTI)

In nuclear fusion experiments, the plasma facing components are exposed to high heat fluxes and infrared (IR) imaging diagnostics are routinely used for surveying their surface temperature for preventing damages. However the future use of metallic components in the ITER tokamak adds complications in temperature estimation. Indeed, low and variable emissivity of the observed surface and the multiple reflections of the light coming from hot regions will have to be understood and then taken into account. In this paper, a realistic photonic modeling based on Monte Carlo ray-tracing codes is used to predict the global response of the complete IR survey system. This also includes the complex vessel geometry and the thermal and optical surface properties using the bidirectional reflectivity distribution function that models the photon-material interactions. The first results of this simulation applied to a reference torus are presented and are used as a benchmark to investigate the validity of the global model. Finally the most critical key model parameters in the reflected signals are identified and their contribution is discussed.

Aumeunier, M.-H.; Travere, J.-M. [CEA, IRFM, Saint-Paul-Les-Durance F-13108 (France)

2010-10-15T23:59:59.000Z

23

US ITER | Jobs  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

BUSINESS WITH US ITER | MEDIA CORNER | JOBS | CONTACT US US Job Postings International Job Postings Careers in Fusion Science ITER Jobs Home > US ITER Jobs Be a Part of...

24

US ITER | Doing Business  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

US ITER > Business Opportunties > For Vendors > Tokamak Cooling Water System Opportunities Tokamak Cooling Water System (TCWS) Opportunities US ITER has contracted with AREVA...

25

US ITER | About  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

potential to leak radioactive cooling water to the environment by eliminating roof-top heat exchangers. News ITER Organization: Procurement Day for the ITER Tokamak Cooling...

26

US ITER | Media Corner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ITER preps for high performance plasma heating US ITER preps for high performance plasma heating New test results and innovations advance ion cyclotron high power transmission...

27

Review of recent experimental and modeling progress in the lower hybrid range of frequencies at ITER relevant parameters  

SciTech Connect (OSTI)

Progress in experiment and simulation capability in the lower hybrid range of frequencies (LHRF) at ITER relevant parameters is reviewed. Use of LH power in reactor devices is motivated in terms of its potential for efficient off-axis current profile control. Recent improvements in simulation capability including the development of full-wave field solvers, inclusion of the scrape off layer (SOL) in wave propagation codes, the use of coupled ray tracing / full-wave / 3D (r v{sub ?}, v{sub ?}) Fokker Planck models, and the inclusion of nonlinear broadening effects in ray tracing / Fokker Planck codes are discussed. Experimental and modeling results are reviewed which are aimed at understanding the spectral gap problem in LH current drive (LHCD) and the density limit that has been observed in LHCD experiments. Physics mechanisms that could be operative in these experiments are discussed, including toroidally induced variations in the parallel wavenumber, nonlinear broadening of the pump wave, scattering of LH waves from density fluctuations in the SOL, and spectral broadening at the plasma edge via full-wave effects.

Bonoli, Paul T. [Plasma Science and Fusion Center, NW16-240, MIT, Cambridge, MA 02139 (United States)

2014-02-12T23:59:59.000Z

28

Review of recent experimental and modeling progress in the lower hybrid range of frequencies at ITER relevant parameters  

SciTech Connect (OSTI)

Progress in experiment and simulation capability in the lower hybrid range of frequencies at ITER relevant parameters is reviewed. Use of LH power in reactor devices is motivated in terms of its potential for efficient off-axis current profile control. Recent improvements in simulation capability including the development of full-wave field solvers, inclusion of the scrape off layer (SOL) in wave propagation codes, the use of coupled ray tracing/full-wave/3D (r v{sub ?}, v{sub //}) Fokker Planck models, and the inclusion of wave scattering as well as nonlinear broadening effects in ray tracing / Fokker Planck codes are discussed. Experimental and modeling results are reviewed which are aimed at understanding the spectral gap problem in LH current drive (LHCD) and the density limit that has been observed and mitigated in LHCD experiments. Physics mechanisms that could be operative in these experiments are discussed, including toroidally induced variations in the parallel wavenumber, nonlinear broadening of the pump wave, scattering of LH waves from density fluctuations in the SOL, and spectral broadening at the plasma edge via full-wave effects.

Bonoli, Paul T. [Plasma Science and Fusion Center, NW16-240, MIT, Cambridge, Massachusetts 02139 (United States)

2014-06-15T23:59:59.000Z

29

The Oil Drilling Model and Iterative Deepening Genetic Annealing Algorithm for the Traveling Salesman Problem  

Science Journals Connector (OSTI)

In this work, we liken the solving of combinatorial optimization problems under a prescribed computational budget as hunting for oil in an unexplored ground. Using this generic model, we instantiate an iterati...

Hoong Chuin Lau; Fei Xiao

2008-01-01T23:59:59.000Z

30

A multi-scale iterative approach for finite element modeling of thermal contact resistance  

E-Print Network [OSTI]

Surface topography has long been considered a key factor in the performance of many contact applications including thermal contact resistance. However, essentially all analytical and numerical models of thermal contact ...

Thompson, Mary Kathryn, 1980-

2007-01-01T23:59:59.000Z

31

Iterative modelling, a new approach to the inversion of 1-D seismograms  

E-Print Network [OSTI]

employed to invert synthetic seismic data. It must be stressed that this scheme is not the only possible processing flow which could adequately invert the data. However. the scheme discussed herein appears to converge to a wide variety of models... employed to invert synthetic seismic data. It must be stressed that this scheme is not the only possible processing flow which could adequately invert the data. However. the scheme discussed herein appears to converge to a wide variety of models...

Raskin, Greg Steven

2012-06-07T23:59:59.000Z

32

US ITER | Jobs  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Postings Careers in Fusion Science ITER Jobs Home > Jobs > Careers in Fusion Science Learn More About Working at US ITER and Careers in Fusion Science Jan Berry Takes a Different...

33

US ITER | Media Corner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

test bed ring will load ITER transmission lines with up to 6 megawatts New test bed ring will load ITER transmission lines with up to 6 megawatts -Agatha Bardoel Published April...

34

US ITER | Media Corner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Theoretical physicist and 2007-2009 Chairman of the Council of ITER, Chris Llewellyn Smith, contextualizes the urgency of the ITER project in an energy market that could see the...

35

US ITER | Media Corner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

May Diagnose Fusion Energy Reactors Scientific Computing, September 19, 2009 Nuclear fusion power project to start in 2018: Official PhysOrg.com, June 18, 2009 ITER Council...

36

US ITER | Media Corner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Bush Issues Executive Order Designating ITER International Fusion Energy Organization A Public International Organization November 19, 2007 The perfect fuel: New Hampshire...

37

US ITER | Jobs  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Frank Casella US ITER Quality Assurance, Environmental, Safety and Health and Licensing Support Manager Tell us about your background Frank Casella Frank Casella I was born in...

38

US ITER | Media Corner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

delivery components for ITER advances Delivery of tokamak cooling water system drain tanks will begin in 2014 -Katie Elyce Jones Published August 19, 2013 Vacuum Pressure...

39

US ITER | Contact Us  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ITER International Department of Energy Office of Science Oak Ridge National Laboratory Princeton Plasma Physics Laboratory Savannah River National Laboratory Last updated: 0521...

40

US ITER | Doing Business  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ITER International Department of Energy Office of Science Oak Ridge National Laboratory Princeton Plasma Physics Laboratory Savannah River National Laboratory Last updated:...

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

US ITER | Contact Us  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ITER International Department of Energy Office of Science Oak Ridge National Laboratory Princeton Plasma Physics Laboratory Savannah River National Laboratory Last updated: 0327...

42

US ITER | Media Corner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the Around the World of Fusion (Link to complete list.) Fusion Energy Production by Neutral Particle Injection This visualization demonstrates how the ITER reactor will create a...

43

US ITER | About  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ion Cyclotron Heating Transmission Lines Ion Cyclotron Heating Transmission Lines (WBS 1.5.1) Fact Sheet ICH Image Highlighted in pink: ITER Ion Cyclotron Heating Transmission...

44

US ITER | About  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Systems EC Transmission Lines Electrical Network Exhaust IC Transmission Lines Magnet Pellet Injection Vacuum US Hardware Home > About US ITER > US Hardware US Hardware...

45

US ITER | About  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Electron Cyclotron Heating Transmission Lines Electron Cyclotron Heating Transmission Lines (WBS 1.5.2) Fact Sheet Electron Cyclotron Heating System Image Highlighted in pink: ITER...

46

Iterated finite-orbit Monte Carlo simulations with full-wave fields for modeling tokamak ion cyclotron resonance frequency wave heating experiments  

SciTech Connect (OSTI)

The five-dimensional finite-orbit Monte Carlo code ORBIT-RF[M. Choi et al., Phys. Plasmas 12, 1 (2005)] is successfully coupled with the two-dimensional full-wave code all-orders spectral algorithm (AORSA) [E. F. Jaeger et al., Phys. Plasmas 13, 056101 (2006)] in a self-consistent way to achieve improved predictive modeling for ion cyclotron resonance frequency (ICRF) wave heating experiments in present fusion devices and future ITER [R. Aymar et al., Nucl. Fusion 41, 1301 (2001)]. The ORBIT-RF/AORSA simulations reproduce fast-ion spectra and spatial profiles qualitatively consistent with fast ion D-alpha [W. W. Heidbrink et al., Plasma Phys. Controlled Fusion 49, 1457 (2007)] spectroscopic data in both DIII-D [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] and National Spherical Torus Experiment [M. Ono et al., Nucl. Fusion 41, 1435 (2001)] high harmonic ICRF heating experiments. This work verifies that both finite-orbit width effect of fast-ion due to its drift motion along the torus and iterations between fast-ion distribution and wave fields are important in modeling ICRF heating experiments.

Choi, M.; Chan, V. S.; Lao, L. L.; Pinsker, R. I. [General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States); Green, D.; Berry, L. A.; Jaeger, F.; Park, J. M. [Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830 (United States); Heidbrink, W. W.; Liu, D.; Podesta, M. [University of California-Irvine, Irvine, California 92697 (United States); Harvey, R. [CompX, P.O. Box 2672, Del Mar, California 92014-5672 (United States); Smithe, D. N. [Tech-X Corporation, Boulder, Colorado 80303 (United States); Bonoli, P. [Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2010-05-15T23:59:59.000Z

47

Photo: US ITER/ORNL INSIDE: ITER Site Progress  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

gears and top of the twin-screw extruder mechanism of the prototype developed for ITER. Photo: US ITERORNL INSIDE: ITER Site Progress View from DOE US Systems Update ITER Magazine...

48

ITER | Princeton Plasma Physics Lab  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ITER http:mediacentral.princeton.eduid04m7zh6z3 What is ITER? ITER is a large international fusion experiment aimed at demonstrating the scientific and technological...

49

A test of the continuous spontaneous localization model involving two particles  

E-Print Network [OSTI]

We describe a previously unexplored effect of the continuous spontaneous localization model whereby a correlation develops in the distributions of two nearby non-interacting particles following a period of diffusion. We propose the use of this effect as an experimental test differentiating between the continuous spontaneous localization model and standard quantum theory. The test involves building a joint probability distribution for the locations of the two particles by repeatedly releasing them from two nearby traps and subsequently measuring their positions after a brief period of time. We examine the scales of time, trap size, and particle mass necessary for observation.

Daniel Bedingham

2014-11-26T23:59:59.000Z

50

US ITER | Media Corner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

one of the world's largest and most powerful electromagnets to energize the ITER tokamak, a device that confines plasma in the shape of a doughnut. The 13 meter tall central...

51

US ITER | About  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Tokamak Exhaust Processing Systems Tokamak Exhaust Processing System (WBS 1.3.2) FactSheet Exhaust Process Image The ITER tokamak exhaust process design. The US is responsible for...

52

Overview of ITER safety  

SciTech Connect (OSTI)

This paper presents an overview of safety in the International Thermonuclear Experimental Reactor (ITER) project midway through the Engineering Design Activities (EDA). We describe the safety strategy and approach used by the project. Then, we present project radiological release limits with the methodology used to determine if these release limits are met. We review the major safety functions and their implementation for ITER, previous results, and plans for upcoming safety and environmental analyses. 16 refs., 2 figs., 3 tabs.

Petti, D.A. [Idaho National Engineering Lab., Idaho Falls, ID (United States); Piet, S.J. [ITER San Diego Joint Work Site, La Jolla, CA (United States)

1996-12-31T23:59:59.000Z

53

Iterated multidimensional wave conversion  

SciTech Connect (OSTI)

Mode conversion can occur repeatedly in a two-dimensional cavity (e.g., the poloidal cross section of an axisymmetric tokamak). We report on two novel concepts that allow for a complete and global visualization of the ray evolution under iterated conversions. First, iterated conversion is discussed in terms of ray-induced maps from the two-dimensional conversion surface to itself (which can be visualized in terms of three-dimensional rooms). Second, the two-dimensional conversion surface is shown to possess a symplectic structure derived from Dirac constraints associated with the two dispersion surfaces of the interacting waves.

Brizard, A. J. [Dept. Physics, Saint Michael's College, Colchester, VT 05439 (United States); Tracy, E. R.; Johnston, D. [Dept. Physics, College of William and Mary, Williamsburg, VA 23187-8795 (United States); Kaufman, A. N. [LBNL and Physics Dept., UC Berkeley, Berkeley, CA 94720 (United States); Richardson, A. S. [T-5, LANL, Los Alamos, NM 87545 (United States); Zobin, N. [Dept. Mathematics, College of William and Mary, Williamsburg, VA 23187-8795 (United States)

2011-12-23T23:59:59.000Z

54

The physics role of ITER  

SciTech Connect (OSTI)

Experimental research on the International Thermonuclear Experimental Reactor (ITER) will go far beyond what is possible on present-day tokamaks to address new and challenging issues in the physics of reactor-like plasmas. First and foremost, experiments in ITER will explore the physics issues of burning plasmas--plasmas that are dominantly self-heated by alpha-particles created by the fusion reactions themselves. Such issues will include (i) new plasma-physical effects introduced by the presence within the plasma of an intense population of energetic alpha particles; (ii) the physics of magnetic confinement for a burning plasma, which will involve a complex interplay of transport, stability and an internal self-generated heat source; and (iii) the physics of very-long-pulse/steady-state burning plasmas, in which much of the plasma current is also self-generated and which will require effective control of plasma purity and plasma-wall interactions. Achieving and sustaining burning plasma regimes in a tokamak necessarily requires plasmas that are larger than those in present experiments and have higher energy content and power flow, as well as much longer pulse length. Accordingly, the experimental program on ITER will embrace the study of issues of plasma physics and plasma-materials interactions that are specific to a reactor-scale fusion experiment. Such issues will include (i) confinement physics for a tokamak in which, for the first time, the core-plasma and the edge-plasma are simultaneously in a reactor-like regime; (ii) phenomena arising during plasma transients, including so-called disruptions, in regimes of high plasma current and thermal energy; and (iii) physics of a radiative divertor designed for handling high power flow for long pulses, including novel plasma and atomic-physics effects as well as materials science of surfaces subject to intense plasma interaction. Experiments on ITER will be conducted by researchers in control rooms situated at major fusion laboratories around the world, linked by high-speed computer networks--thus extending further what is already a much-acclaimed paradigm for international collaboration in science.

Rutherford, P.H.

1997-04-01T23:59:59.000Z

55

ITER Fusion Energy  

ScienceCinema (OSTI)

ITER (in Latin ?the way?) is designed to demonstrate the scientific and technological feasibility of fusion energy. Fusion is the process by which two light atomic nuclei combine to form a heavier over one and thus release energy. In the fusion process two isotopes of hydrogen ? deuterium and tritium ? fuse together to form a helium atom and a neutron. Thus fusion could provide large scale energy production without greenhouse effects; essentially limitless fuel would be available all over the world. The principal goals of ITER are to generate 500 megawatts of fusion power for periods of 300 to 500 seconds with a fusion power multiplication factor, Q, of at least 10. Q ? 10 (input power 50 MW / output power 500 MW). The ITER Organization was officially established in Cadarache, France, on 24 October 2007. The seven members engaged in the project ? China, the European Union, India, Japan, Korea, Russia and the United States ? represent more than half the world?s population. The costs for ITER are shared by the seven members. The cost for the construction will be approximately 5.5 billion Euros, a similar amount is foreseen for the twenty-year phase of operation and the subsequent decommissioning.

Dr. Norbert Holtkamp

2010-01-08T23:59:59.000Z

56

Regional groundwater modeling of the saturated zone in the vicinity of Yucca Mountain, Nevada; Iterative Performance Assessment, Phase 2  

SciTech Connect (OSTI)

Results of groundwater modeling of the saturated zone in the vicinity of Yucca Mountain are presented. Both a regional (200 {times} 200 km) and subregional (50 {times} 50 km) model were used in the analyses. Simulations were conducted to determine the impact of various disruptive that might take place over the life span of a proposed Yucca Mountain geologic conditions repository on the groundwater flow field, as well as changes in the water-table elevations. These conditions included increases in precipitation and groundwater recharge within the regional model, changes in permeability of existing hydrogeologic barriers, a:nd the vertical intrusion of volcanic dikes at various orientations through the saturated zone. Based on the regional analysis, the rise in the water-table under Yucca Mountain due to various postulated conditions ranged from only a few meters to 275 meters. Results of the subregional model analysis, which was used to simulate intrusive dikes approximately 4 kilometers in length in the vicinity of Yucca Mountain, showed water-table rises ranging from a few meters to as much as 103 meters. Dikes oriented approximately north-south beneath Yucca Mountain produced the highest water-table rises. The conclusions drawn from this analysis are likely to change as more site-specific data become available and as the assumptions in the model are improved.

Ahola, M.; Sagar, B. [Southwest Research Inst., San Antonio, TX (United States). Center for Nuclear Waste Regulatory Analyses

1992-10-01T23:59:59.000Z

57

PPPL--2702 Power Radiated from ITER  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

702 702 " Power Radiated from ITER and CIT by Impurities D E ~ O 014715 J. Cummings, S. A. Cohen, R Hulse, D. E. Post, M. H. Redi and J. Perkinst Princeton Plasma Physics Laboratory Princeton University, Rinceton, NJ 08543 Abstract The MIST code has been used to model impurity radiation from the edge and core plasmas in ITER and CIT. A broad range of parameters have been varied, including Zeff, impurity species, impurity transport coefficients, and plasma temperature and density profiles, especially at the edge. For a set of these parameters representative of the baseline ITER ignition scenario, it is seen that impurity radiation, which is produced in roughly equal amounts by the edge and core regions, can make a major improvement in divertor operation without compromising core

58

Reflectometry on ITER  

Science Journals Connector (OSTI)

Reflectometry will be used on ITER to measure the density profile in the main plasma and divertor regions and to measure the plasma position and shape in order to provide a standby reference for the magnetic diagnostics in long pulse discharges. The high temperatures of the ITER core and the resultant significant relativistic downshift of the second-harmonic electron cyclotron absorption imply that both low-field side O-mode and high-field side lower cut-off (X?l mode) systems are required to access the full plasma profile. A low-field side upper cut-off (X?u mode) system will also be required for measurements of the scrape-off layer. For measurements of the plasma position and shape an O-mode system is optimum due to the large range of magnetic field along the plasma periphery and the wide range of possible plasma configurations achievable on ITER. A robust real-time calibration technique of the whole transmission line is required. It is likely that an accurate estimate of the position of the plasma will require the simultaneous use of signals from the profile reflectometer. For the divertor profiles with peak densities in the range 1019–1022/m3 are to be measured with a target resolution of 3 mm. The large density range will necessitate the use of more than one system. Installing these reflectometers on ITER incurs additional difficulties such as the routing of the millimetre wave radiation around the complicated first wall and divertor structures and design of antennas able to operate through the first wall and blanket.

N. Bretz; E. Doyle; V. A. Vershkov; A. J. H. Donné; J. Irby; M. E. Manso; A. Mase; J. Sanchez; V. F. Shevchenko; C. I. Walker; ITER Joint Central Team and Home Teams

1997-01-01T23:59:59.000Z

59

SciDAC Center for Simulation of Wave-Plasma Interactions - Iterated Finite-Orbit Monte Carlo Simulations with Full-Wave Fields for Modeling Tokamak ICRF Wave Heating Experiments - Final Report  

SciTech Connect (OSTI)

This final report describes the work performed under U.S. Department of Energy Cooperative Agreement DE-FC02-08ER54954 for the period April 1, 2011 through March 31, 2013. The goal of this project was to perform iterated finite-orbit Monte Carlo simulations with full-wall fields for modeling tokamak ICRF wave heating experiments. In year 1, the finite-orbit Monte-Carlo code ORBIT-RF and its iteration algorithms with the full-wave code AORSA were improved to enable systematical study of the factors responsible for the discrepancy in the simulated and the measured fast-ion FIDA signals in the DIII-D and NSTX ICRF fast-wave (FW) experiments. In year 2, ORBIT-RF was coupled to the TORIC full-wave code for a comparative study of ORBIT-RF/TORIC and ORBIT-RF/AORSA results in FW experiments.

Choi, Myunghee [Retired] [Retired; Chan, Vincent S. [General Atomics] [General Atomics

2014-02-28T23:59:59.000Z

60

Photo: US ITER/ORNL INSIDE: ITER Site Progress  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

current transformers, HV circuit breakers, HV potential transformers, HV surge arresters, HV substation hardware, and HV substation transformers. Delivery of equipment to the ITER...

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Benchmarking ICRF simulations for ITER  

SciTech Connect (OSTI)

Abstract Benchmarking of full-wave solvers for ICRF simulations is performed using plasma profiles and equilibria obtained from integrated self-consistent modeling predictions of four ITER plasmas. One is for a high performance baseline (5.3 T, 15 MA) DT H-mode plasma. The others are for half-field, half-current plasmas of interest for the pre-activation phase with bulk plasma ion species being either hydrogen or He4. The predicted profiles are used by seven groups to predict the ICRF electromagnetic fields and heating profiles. Approximate agreement is achieved for the predicted heating power partitions for the DT and He4 cases. Profiles of the heating powers and electromagnetic fields are compared.

R. V. Budny, L. Berry, R. Bilato, P. Bonoli, M. Brambilla, R.J. Dumont, A. Fukuyama, R. Harvey, E.F. Jaeger, E. Lerche, C.K. Phillips, V. Vdovin, J. Wright, and members of the ITPA-IOS

2010-09-28T23:59:59.000Z

62

ITER Project Scientific Foundations Mission  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ITER Project Scientific Foundations Mission Investment and Return Fusion reactions power the sun and the stars. To achieve fusion power on earth, a fusion reactor requires a...

63

Princeton Plasma Physics Lab - ITER  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

iter ITER is a large international iter ITER is a large international fusion experiment aimed at demonstrating the scientific and technological feasibility of fusion energy.ITER (Latin for "the way") will play a critical role advancing the worldwide availability of energy from fusion - the power source of the sun and the stars.To produce practical amounts of fusion power on earth, heavy forms of hydrogen are joined together at high temperature with an accompanying production of heat energy. The fuel must be held at a temperature of over 100 million degrees Celsius. At these high temperatures, the electrons are detached from the nuclei of the atoms, in a state of matter called plasma. en New imaging technique provides improved insight into controlling the plasma in fusion experiments

64

PTRANSP Tests Of TGLF And Predictions For ITER  

SciTech Connect (OSTI)

One of the physics goals for ITER is to achieve high fusion power PDT at a high gain QDT. This goal is important for studying the physics of reactor-relevant burning plasmas. Simulations of plasma performance in ITER can help achieve this goal by aiding in the design of systems such as diagnostics and in planning ITER plasma regimes. Simulations can indicate areas where further research in theory and experiments is needed. To have credible simulations integrated modeling is necessary since plasma profiles and applied heating, torque, and current drive are strongly coupled.

Robert V. Budny, Xingqiu Yuan, S. Jardin, G. Hammett, G. Staebler, members of the ITPA Transport and Confinement Topical Group, and JET EFDA Contributions

2012-02-28T23:59:59.000Z

65

RF-driven advanced modes of ITER operation  

SciTech Connect (OSTI)

The impact of the Radio Frequency heating and current drive systems on the ITER advanced scenarios is analyzed by means of the CRONOS suite of codes for integrated tokamak modelling. As a first step, the code is applied to analyze a high power advanced scenario discharge of JET in order to validate both the heating and current drive modules and the overall simulation procedure. Then, ITER advanced scenarios, based on Radio Frequency systems, are studied on the basis of previous results. These simulations show that both hybrid and steady-state scenarios could be possible within the ITER specifications, using RF heating and current drive only.

Garcia, J.; Artaud, J. F.; Basiuk, V.; Decker, J.; Giruzzi, G.; Hawkes, N.; Imbeaux, F.; Litaudon, X.; Mailloux, J.; Peysson, Y.; Schneider, M. [CEA, IRFM, F-13108 Saint-Paul-lez-Durance (France); Brix, M. [UKAEA/Euratom Fusion Association, Culham Science Centre, Abingdon, Oxon, OX14 3DB (United Kingdom)

2009-11-26T23:59:59.000Z

66

ITER Diagnostic First Wal  

SciTech Connect (OSTI)

The ITER Diagnostic Division is responsible for designing and procuring the First Wall Blankets that are mounted on the vacuum vessel port plugs at both the upper and equatorial levels This paper will discuss the effects of the diagnostic aperture shape and configuration on the coolant circuit design. The DFW design is driven in large part by the need to conform the coolant arrangement to a wide variety of diagnostic apertures combined with the more severe heating conditions at the surface facing the plasma, the first wall. At the first wall, a radiant heat flux of 35W/cm2 combines with approximate peak volumetric heating rates of 8W/cm3 (equatorial ports) and 5W/cm3 (upper ports). Here at the FW, a fast thermal response is desirable and leads to a thin element between the heat flux and coolant. This requirement is opposed by the wish for a thicker FW element to accommodate surface erosion and other off-normal plasma events.

G. Douglas Loesser, et. al.

2012-09-21T23:59:59.000Z

67

Optical model potentials involving loosely bound p-shell nuclei around 10 MeV/nucleon  

E-Print Network [OSTI]

. Trache, A. Azhari, H. L. Clark, C. A. Gagliardi, Y.-W Cyclotron Institute, Texas A&M University F. Carstoi Institute of Atomic Physics, P.O ~Received 25 August 1999; We present the results of a search for optical model and transfer reactions...

Trache, L.; Azhari, A.; Clark, HL; Gagliardi, Carl A.; Lui, YW; Mukhamedzhanov, AM; Tribble, Robert E.; Carstoiu, F.

2000-01-01T23:59:59.000Z

68

Using dual decomposition for solving problems involving data uncertainty |  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

dual decomposition for solving problems involving data uncertainty dual decomposition for solving problems involving data uncertainty August 14, 2013 Tweet EmailPrint Many applications mdash; energy, routing, scheduling, and production planning, for example mdash; involve problems in which some or all of the data may not be known when decisions under uncertainty must be made. In such cases, approximations with stochastic mixed-integer programming models are often used. Two approaches have been suggested to address such problems: dual decomposition (DD) and branch-and-price (BP). Both approaches divide the problem into two or more subproblems, together with linear constraints that enforce agreement between solutions to the different problems through a series of iterations. Unfortunately, both approaches also suffer from lack

69

Genome-Wide Identification and 3D Modeling of Proteins involved in DNA Damage Recognition and Repair (Final Report)  

SciTech Connect (OSTI)

DNA Damage Recognition and Repair (DDR&R) proteins play a critical role in cellular responses to low-dose radiation and are associated with cancer. We have performed a systematic, genome-wide computational analysis of genomic data for human genes involved in the DDR&R process. The significant achievements of this project include: 1) Construction of the computational pipeline for searching DDR&R genes, building and validation of 3D models of proteins involved in DDR&R; 2) Functional and structural annotation of the 3D models and generation of comprehensive lists of suggested knock-out mutations; and the development of a method to predict the effects of mutations. Large scale testing of technology to identify novel small binding pockets in protein structures leading to new DDRR inhibitor strategies 3) Improvements of macromolecular docking technology (see the CAPRI 1-3 and 4-5 results) 4) Development of a new algorithm for improved analysis of high-density oligonucleotide arrays for gene expression profiling; 5) Construction and maintenance of the DNA Damage Recognition and Repair Database; 6) Producing 15 research papers (12 published and 3 in preparation).

Abagyan, Ruben; An, Jianghong

2005-08-12T23:59:59.000Z

70

Genome-Wide Identification and 3D Modeling of Proteins involved in DNA Damage Recognition and Repair (Final Report)  

SciTech Connect (OSTI)

OAK-B135 DNA Damage Recognition and Repair (DDR and R) proteins play a critical role in cellular responses to low-dose radiation and are associated with cancer. the authors have performed a systematic, genome-wide computational analysis of genomic data for human genes involved in the DDR and R process. The significant achievements of this project include: (1) Construction of the computational pipeline for searching DDR and R genes, building and validation of 3D models of proteins involved in DDR and R; (2) Functional and structural annotation of the 3D models and generation of comprehensive lists of suggested knock-out mutations; (3) Important improvement of macromolecular docking technology and its application to predict the DNA-Protein complex conformation; (4) Development of a new algorithm for improved analysis of high-density oligonucleotide arrays for gene expression profiling; (5) Construction and maintenance of the DNA Damage Recognition and Repair Database; and (6) Producing 14 research papers (10 published and 4 in preparation).

Ruben A. Abagyan, PhD

2004-04-15T23:59:59.000Z

71

DIII-D Research in Support of ITER  

SciTech Connect (OSTI)

DIII-D research is providing key information for the design and operation of ITER. Discharges that simulate ITER operating scenarios in conventional H-mode, advanced inductive, hybrid, and steady state regimes have achieved normalized performance consistent with ITER's goals for fusion performance. Stationary discharges with high {beta}{sub N} and 90% noninductive current that project to Q=5 in ITER have been sustained for a current relaxation time ({approx}2.5 s), and high-beta wall-stabilized discharges with fully non-inductive current drive have been sustained for more than one second. Detailed issues of plasma control have been addressed, including the development of a new large-bore startup scenario for ITER. A broad research program provides the physics basis for predicting the performance of ITER. Recent key results include the discovery that the L-H power threshold is reduced with low neutral beam torque, and the development of a successful model for prediction of the H-mode pedestal height in DIII-D. Research areas with the potential to improve ITER's performance include the demonstration of ELM-free 'QH-mode' discharges with both co and counter-injection, and validation of the predicted torque generated by static, non-axisymmetric magnetic fields. New diagnostics provide detailed benchmarking of turbulent transport codes and direct measurements of the anomalous transport of fast ions by Alfven instabilities. DIII-D research also contributes to the basis for reliable operation in ITER, through active control of the chief performance-limiting instabilities. Recently, ELM suppression with resonant magnetic perturbations has been demonstrated at collisionality similar to ITER's, while simultaneous stabilization of NTMs (by localized current drive) and RWMs (by magnetic feedback) has allowed stable operation at high beta and low rotation. In research aimed at improving the lifetime of material surfaces near the plasma, recent experiments have investigated several approaches to mitigation of disruptions, including injection of low-Z gas and low-Z pellets, and have shown the conditions that minimize core impurity accumulation during radiative divertor operation. Investigation of carbon erosion, transport, and co-deposition with hydrogenic species, and methods for the removal of co-deposits, will contribute to the physics basis for initial operation of ITER with a carbon divertor.

Strait, E

2008-10-14T23:59:59.000Z

72

U.S. ITER | Princeton Plasma Physics Lab  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sciences The ITER Project: International Collaboration to Demonstrate Nuclear Fusion Read more about The ITER Project: International Collaboration to Demonstrate...

73

ITER?  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

properties? * Can the tokamak confinement concept be extended to the continuous, self-sustaining regime required for future power plants? * What materials and components are...

74

Iterative Bridge and Roll for Connection Rerouting  

Science Journals Connector (OSTI)

We propose a heuristic connection rerouting scheme that iteratively bridges and rolls a subset of connections for improving network utilization. The proposed scheme has no disrupted...

Zhang, Qiong; Gao, Chengyi; Wang, Xi; Palacharla, Paparao; Sekiya, Motoyoshi

75

Future U.S. ITER Safety Studies  

SciTech Connect (OSTI)

With the US re-entering the ITER project, the US safety program has been tasked to address safety issues left unresolved during the US absence over the past five years. As a consequence our current and future US ITER safety studies will focus on validating US safety analysis tools that underpin the ITER safety analysis, refining in-vessel dust and tritium inventory safety limits and developing corresponding dust and tritium removal strategies that will demonstrate compliance with ITER limits without hampering operational flexibility of the machine00.

Petti, D.A.; Merrill, B.J. [Idaho National Engineering and Environmental Laboratory (United States)

2005-05-15T23:59:59.000Z

76

Funding for nuclear fusion Expensive Iteration  

E-Print Network [OSTI]

producing more energy than is put in. The International Thermonuclear Experimental Reactor became plain ITER aims to produce energy by fusing together the nuclei of hydrogen atoms, confined in a magnetic field. The proposal also needs approval from the European Parliament. Some Green MEPs have called for ITER

77

Iterative multiuser detection techniques for CDMA systems  

E-Print Network [OSTI]

) with (3. 40) where (ok" )' and (a&", ) are the variances of g?" and y&", ?, respectively, &t~" is the output of the inference cain:&&ll&&i in iteration n before con&bi?ing with an improved decoder input, fr&&n& the previous iteration n ? 1, denoted...

Du, Xuechao

2012-06-07T23:59:59.000Z

78

Recursive Turtle Programs and Iterated Affine Transformations  

E-Print Network [OSTI]

Recursive Turtle Programs and Iterated Affine Transformations Tao Ju*, Scott Schaefer, Ron Goldman of equivalence between the class of fractals created by Recursive Turtle Programs (RTP) and Iterated Affine, turtle graphics 1 Introduction In computer graphics, there are several different methods for generating 2

Schaefer, Scott

79

ITER --"INTERNATIONAL THERMONUCLEAR EXPERIMENTAL RESEARCH PROGRAM".  

E-Print Network [OSTI]

ITER -- "INTERNATIONAL THERMONUCLEAR EXPERIMENTAL RESEARCH PROGRAM". ORGANIZATION TO DIRECT WORLD plasmas and thermonuclear burn processes (cost -$1.5-36)2. (2) An expanded, more ambitious international Thermonuclear Experimental Research Program" by L. J. Perkins #12;NORMAL-CONDUCTING COPPER OPTIONS FOR THE ITER

80

IAEA-CN-SO/F-I-4 ITER: CONCEPT DEFINITION*  

E-Print Network [OSTI]

way. 1. INTRODUCTION The activity of the International Thermonuclear Experimental Reactor (ITER. * The activity of the International Thermonuclear Experimental Reactor (ITER) is conducted under the auspices

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

ITER have a need for ion cyclotron heating (ICH) as part of the plasma heating system mix to reach the  

E-Print Network [OSTI]

Background ITER have a need for ion cyclotron heating (ICH) as part of the plasma heating system ITER ion cyclotron heating systems design Section view through antenna module Thermal model of antenna The ion cyclotron heating antenna is currently in its preliminary design phase and is undergoing detailed

82

Sawtooth control in ITER using ion cyclotron resonance heating  

SciTech Connect (OSTI)

Numerical modeling of the effects of ion cyclotron resonance heating (ICRH) on the stability of the internal kink mode suggests that ICRH should be considered as an essential sawtooth control tool in ITER. Sawtooth control using ICRH is achieved by directly affecting the energy of the internal kink mode rather than through modification of the magnetic shear by driving localized currents. Consequently, ICRH can be seen as complementary to the planned electron cyclotron current drive actuator, and indeed will improve the efficacy of current drive schemes. Simulations of the ICRH distribution using independent RF codes give confidence in numerical predictions that the stabilizing influence of the fusion-born alphas can be negated by appropriately tailored minority (3)He ICRH heating in ITER. Finally, the effectiveness of all sawtooth actuators is shown to increase as the q = 1 surface moves towards the manetic axis, whilst the passive stabilization arising from the alpha and NBI particles decreases.

Chapman, I. T. [EURATOM CCFE Fus Assoc, Culham Sci Ctr, Abingdon, Oxon, England; Graves, J P [Ecole Polytechnique Federale de Lausanne, Switzerland; Johnson, T. [KTH, EES, EURATOM VR Assoc., Stockholm, Sweden; Asunta, O. [Aalto University, Finland; Bonoli, P. [Massachusetts Institute of Technology (MIT); Choi, M. [General Atomics; Jaeger, E. F. [Oak Ridge National Laboratory (ORNL); Jucker, M. [Ecole Polytechnique Federale de Lausanne, Switzerland; Sauter, O. [Ecole Polytechnique Federale de Lausanne, Switzerland

2011-01-01T23:59:59.000Z

83

Iterated maps for clarinet-like systems  

E-Print Network [OSTI]

The dynamical equations of clarinet-like systems are known to be reducible to a non-linear iterated map within reasonable approximations. This leads to time oscillations that are represented by square signals, analogous to the Raman regime for string instruments. In this article, we study in more detail the properties of the corresponding non-linear iterations, with emphasis on the geometrical constructions that can be used to classify the various solutions (for instance with or without reed beating) as well as on the periodicity windows that occur within the chaotic region. In particular, we find a regime where period tripling occurs and examine the conditions for intermittency. We also show that, while the direct observation of the iteration function does not reveal much on the oscillation regime of the instrument, the graph of the high order iterates directly gives visible information on the oscillation regime (characterization of the number of period doubligs, chaotic behaviour, etc.).

Pierre-André Taillard; Jean Kergomard; Franck Laloë

2010-05-31T23:59:59.000Z

84

Fast iterative graph computation with block updates  

Science Journals Connector (OSTI)

Scaling iterative graph processing applications to large graphs is an important problem. Performance is critical, as data scientists need to execute graph programs many times with varying parameters. The need for a high-level, high-performance programming ...

Wenlei Xie; Guozhang Wang; David Bindel; Alan Demers; Johannes Gehrke

2013-09-01T23:59:59.000Z

85

Energy Panel Asks U.S. to Rejoin ITER  

Science Journals Connector (OSTI)

...fusion project could win out if ITER fails. CREDIT: FIRE/PPPL Full U.S. partnership in the ITER collaboration would cost...fusion project could win out if ITER fails. CREDIT: FIRE/PPPL Full U.S. partnership in the ITER collaboration would cost...

Charles Seife

2002-09-20T23:59:59.000Z

86

The roadmap to magnetic confinement fusion Cutaway of the ITER tokamak. ( ITER)  

E-Print Network [OSTI]

The roadmap to magnetic confinement fusion Cutaway of the ITER tokamak. (© ITER) There are two ways "tokamak" configuration invented by Tamm and Sakharov in 1950 and declassified in 1957 [1] . Over 198 tokamaks have been built [2] . Four large tokamak projects were built in the 1980s. Two of these

Hampshire, Damian

87

JJ, IAP Cambridge January 20101 Fusion Energy & ITER:Fusion Energy & ITER  

E-Print Network [OSTI]

Billions ITERITER startsstarts DEMODEMO decisiondecision:: Fusion impact? Energy without greenEnergyJJ, IAP Cambridge January 20101 Fusion Energy & ITER:Fusion Energy & ITER: Challenges without green house gashouse gas #12;JJ, IAP Cambridge January 20103 3 D + T + He ++ n U235 n n Neutrons

88

US Burning Plasma Workshop Oak Ridge National Laboratory US Contributions to ITER Project (US ITER)  

E-Print Network [OSTI]

US Burning Plasma Workshop Oak Ridge National Laboratory US Contributions to ITER Project (US ITER Plasma Workshop Oak Ridge, TN December 7, 2005 #12;US Burning Plasma Workshop Oak Ridge National '06 Expectations · Summary #12;US Burning Plasma Workshop Oak Ridge National Laboratory Highlights

89

A domain decomposition method of stochastic PDEs: An iterative solution techniques using a two-level scalable preconditioner  

SciTech Connect (OSTI)

Recent advances in high performance computing systems and sensing technologies motivate computational simulations with extremely high resolution models with capabilities to quantify uncertainties for credible numerical predictions. A two-level domain decomposition method is reported in this investigation to devise a linear solver for the large-scale system in the Galerkin spectral stochastic finite element method (SSFEM). In particular, a two-level scalable preconditioner is introduced in order to iteratively solve the large-scale linear system in the intrusive SSFEM using an iterative substructuring based domain decomposition solver. The implementation of the algorithm involves solving a local problem on each subdomain that constructs the local part of the preconditioner and a coarse problem that propagates information globally among the subdomains. The numerical and parallel scalabilities of the two-level preconditioner are contrasted with the previously developed one-level preconditioner for two-dimensional flow through porous media and elasticity problems with spatially varying non-Gaussian material properties. A distributed implementation of the parallel algorithm is carried out using MPI and PETSc parallel libraries. The scalabilities of the algorithm are investigated in a Linux cluster.

Subber, Waad, E-mail: wsubber@connect.carleton.ca; Sarkar, Abhijit, E-mail: abhijit_sarkar@carleton.ca

2014-01-15T23:59:59.000Z

90

Multiple solutions and numerical analysis to the dynamic and stationary models coupling a delayed energy balance model involving latent heat and discontinuous albedo with a deep ocean  

Science Journals Connector (OSTI)

...variability of an energy-balance model with...instability in an energy balance model. Clim...differential equations. New York, NY: Springer...of some diffusive energy balance climate models...pp. 101-156. New York, NY: Academic Press...

2014-01-01T23:59:59.000Z

91

San Diego 01.05.2001 Power and Particle Exhaust in ITER Slide 1 by G. Janeschitz, et.al. _______________________________________________________________________ ITER  

E-Print Network [OSTI]

San Diego 01.05.2001 Power and Particle Exhaust in ITER Slide 1 by G. Janeschitz, et.al. ITER Exhaust in ITER Slide 2 by G. Janeschitz. ITER to pump #12;San Diego; 01.05.2001 Power and Particle Exhaust in ITER Slide 3 by G. Janeschitz. ITER

92

ITER magnet and structure assembly plan  

SciTech Connect (OSTI)

The International Thermonuclear Experimental Reactor (ITER) is the largest tokamak that has ever been planned. The assembly of the ITER machine presents several unique problems for handling, alignment and bracing of the superconducting magnets and structure components, in particular the Toroidal Field (TF) coil with the corresponding Vacuum Vessel (VV) sector (1,200 tonnes), and the Central Solenoid (CS) with the Buckling Cylinder (BC) assembly (1,350 tonnes). Accurate positioning of the toroidal field coils relative to one another, and relative to the central solenoid will be required, to achieve the design stresses in the magnets during cool down, and machine operation. Special tooling will be used to limit component distortion during installation, shorten the schedule, and reduce the cost. Assembly issues and features of handling, positioning, and immobilizing of the superconducting coils and structure components for the ITER are discussed.

Piec, Z.; Puhn, F.; Oikawa, Akira; Helary, J.L.; Ioki, Kimihiro; Johnson, G.; Shimizu, Katsusuke; Tachikawa, Nobuo

1995-12-31T23:59:59.000Z

93

Mixed-level embedding and JIT compilation for an iteratively staged DSL  

Science Journals Connector (OSTI)

This paper explores how to implement an iteratively staged domain-specific language (DSL) by embedding into a functional language. The domain is modelling and simulation of physical systems where models are expressed in terms of non-causal differential-algebraic ...

George Giorgidze; Henrik Nilsson

2010-01-01T23:59:59.000Z

94

Pellet Fueling Technology Development Leading to Efficient Fueling of ITER Burning Plasmas  

SciTech Connect (OSTI)

Pellet injection is the primary fueling technique planned for central fueling of the ITER burning plasma, which is a requirement for achieving high fusion gain. Injection of pellets from the inner wall has been shown on present day tokamaks to provide efficient fueling and is planned for use on ITER [1,2]. Significant development of pellet fueling technology has occurred as a result of the ITER R&D process. Extrusion rates with batch extruders have reached more than 1/2 of the ITER design specification of 1.3 cm3/s [3] and the ability to fuel efficiently from the inner wall by injecting through curved guide tubes has been demonstrated on several fusion devices. Modeling of the fueling deposition from inner wall pellet injection has been done using the Parks et al. ExB drift model [4] shows that inside launched pellets of 3mm size and speeds of 300 m/s have the capability to fuel well inside the separatrix. Gas fueling on the other hand is calculated to have very poor fueling efficiency due to the high density and wide scrape off layer compared to current machines. Isotopically mixed D/T pellets can provide efficient tritium fueling that will minimize tritium wall loading when compared to gas puffing of tritium. In addition, the use of pellets as an ELM trigger has been demonstrated and continues to be investigated as an ELM mitigation technique. During the ITER CDA and EDA the U.S. was responsible for ITER fueling system design and R&D and is in good position to resume this role for the ITER pellet fueling system. Currently the performance of the ITER guide tube design is under investigation. A mockup is being built that will allow tests with different pellet sizes and repetition rates. The results of these tests and their implication for fueling efficiency and central fueling will be discussed. The ITER pellet injection technology developments to date, specified requirements, and remaining development issues will be presented along with a plan to reach the design goal in time for employment on ITER.

Baylor, Larry R [ORNL; Combs, Stephen Kirk [ORNL; Jernigan, Thomas C [ORNL; Houlberg, Wayne A [ORNL; Maruyama, S. [ITER International Team, Garching, Germany; Owen, Larry W [ORNL; Parks, P. B. [General Atomics; Rasmussen, David A [ORNL

2005-01-01T23:59:59.000Z

95

Beyond ITER: Neutral beams for DEMO  

E-Print Network [OSTI]

In the development of magnetically confined fusion as an economically sustainable power source, ITER is currently under construction. Beyond ITER is the DEMO programme in which the physics and engineering aspects of a future fusion power plant will be demonstrated. DEMO will produce net electrical power. The DEMO programme will be outlined and the role of neutral beams for heating and current drive will be described. In particular, the importance of the efficiency of neutral beam systems in terms of injected neutral beam power compared to wallplug power will be discussed. Options for improving this efficiency including advanced neutralisers and energy recovery are discussed.

McAdams, R

2013-01-01T23:59:59.000Z

96

Multiple solutions and numerical analysis to the dynamic and stationary models coupling a delayed energy balance model involving latent heat and discontinuous albedo with a deep ocean  

Science Journals Connector (OSTI)

...6. Funding statement The research of J.I.D. and L.T...2014 Parameter estimation for energy balance models with memory...Diaz, and II Vrabie. 2001 An abstract approximate controllability...analysis of some diffusive energy balance climate models. Mathematics...

2014-01-01T23:59:59.000Z

97

Iterated Green Functions 1 This article has appeared in  

E-Print Network [OSTI]

Iterated Green Functions 1-120. Sharp estimates for iterated Green functions H.-Ch. Grunau 1 and G. Sweers 2 (poly)harmonic Green functions corresponding to zero Dirichlet boundary c* *on- ditions

Grunau, Hans-Christoph

98

Microtearing Instability In The ITER Pedestal  

SciTech Connect (OSTI)

Unstable microtearing modes are discovered by the GS2 gyrokinetic siimulation code, in the pedestal region of a simulated ITER H-mode plasma with approximately 400 WM DT fusion power. Existing nonlinear theory indicates that these instabilities should produce stochastic magnetic fields and broaden the pedestal. The resulted electron thermal conductivity is estimated and the implications of these findings are discussed.

K.L. Wong, D.R. Mikkelsen, G.M. Rewoldt and R. Budny

2010-12-01T23:59:59.000Z

99

Spectral resolvability of iterated rippled noise  

Science Journals Connector (OSTI)

A forward?masking experiment was used to estimate the spectral ripple of iterated rippled noise (IRN) that is possibly resolved by the auditory system. Tonal signals were placed at spectral peaks and valleys of IRN maskers for a wide variety of IRN conditions that included different delays number of iterations and stimulus durations. The differences in the forward?masked thresholds of tones at spectral peaks and valleys were used to estimate spectral resolvability and these results were compared to estimates obtained from a gamma?tone filter bank. The IRN spectrum has spectral peaks that are harmonics of the reciprocal of the delay used to generate IRN stimuli. As the number of iterations in the generation of IRN stimuli increases so does the difference in the spectral peak?to?valley ratio. For high number of iterations long delays and long durations evidence for spectral resolvability existed up to the 6th harmonic. For all other conditions spectral resolvability appeared to disappear at harmonics lower than the 6th or was not measurable at all. These data will be discussed in terms of the role spectral resolvability might play in processing the pitch pitch strength and timbre of IRN stimuli. [Work supported by a grant from NIDCD.

2005-01-01T23:59:59.000Z

100

Iterative Collision Resolution in Wireless Networks  

E-Print Network [OSTI]

ITERATIVE COLLISION RESOLUTION IN WIRELESS NETWORKS An Undergraduate Research Scholars Thesis by KATHERINE CHRISTINE STUCKMAN Submitted to Honors and Undergraduate Research Texas A&M University in partial fulfillment... Networks (April 2013) Katherine Christine Stuckman Department of Electrical and Computer Engineering Texas A&M University Research Advisor: Dr. Krishna Narayanan Department of Electrical and Computer Engineering With the growing...

Stuckman, Katherine Christine

2013-03-29T23:59:59.000Z

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While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Limited View Angle Iterative CT Reconstruction  

E-Print Network [OSTI]

;Some Prior Literature in Limited View Tomography CT with limited-angle data and few views IRR algorithm Iterative Reconstruction-Reprojection (IRR) : An Algorithm for Limited Data Cardiac- Computed-views and limited-angle data in divergent-beam CT by E. Y. Sidky, CM Kao, and X. Pan (2006) Few-View Projection

102

Improving eigenpairs of automated multilevel substructuring with subspace iterations  

Science Journals Connector (OSTI)

This paper improves the eigenpair approximations obtained from the automated multilevel substructuring (AMLS) method by subspace iterations. Two variants of AMLS hybrid Subspace Iteration Method (AMLS-SIMa and AMLS-SIMb) are proposed. AMLS-SIMa is a ... Keywords: AMLS, Eigenvalue, Eigenvector, Subspace iteration

Jiacong Yin; Heinrich Voss; Pu Chen

2013-04-01T23:59:59.000Z

103

A technique for generic iteration and its optimization  

Science Journals Connector (OSTI)

Software libraries rely increasingly on iterators to provide generic traversal of data structures. These iterators can be represented either as objects that maintain state or as programs that suspend and resume control. This paper addresses two problems ... Keywords: generic program, iterators

Stephen M. Watt

2006-09-01T23:59:59.000Z

104

Variational iteration method-Some recent results and new interpretations  

Science Journals Connector (OSTI)

This paper is an elementary introduction to the concepts of variational iteration method. First, the main concepts in variational iteration method, such as general Lagrange multiplier, restricted variation, correction functional, are explained heuristically. ... Keywords: 34A34, 34B15, 34C15, 35A15, Nonlinear equations, Variational iteration method

Ji-Huan He

2007-10-01T23:59:59.000Z

105

CCFE-PR(13)44 Beyond ITER: Neutral beams  

E-Print Network [OSTI]

R. McAdams CCFE-PR(13)44 Beyond ITER: Neutral beams for DEMO #12;Enquiries about copyright Kingdom Atomic Energy Authority is the copyright holder. #12;Beyond ITER: Neutral beams for DEMO R. Mc ITER: Neutral beams for DEMOa) R. McAdamsb) EURATOM/CCFE Association, Culham Science Centre, Abingdon

106

Commitment to Public Involvement  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Create a Sustainable Future Commitment to Public Involvement Commitment to Public Involvement LANL is commited to our neighbors August 1, 2013 Lab Director McMillan talks with...

107

HEART SEGMENTATION WITH AN ITERATIVE CHAN-VESE OLIVIER ROUSSEAU, YVES BOURGAULT  

E-Print Network [OSTI]

HEART SEGMENTATION WITH AN ITERATIVE CHAN-VESE ALGORITHM OLIVIER ROUSSEAU, YVES BOURGAULT Abstract. This paper presents 2D and 3D applications of the Chan-Vese model to heart and trachea segmentation. We is to segment the heart muscle from high resolution CT scans of the thorax and to produce meshes

Paris-Sud XI, Université de

108

Iterative methods for neutron transport eigenvalue Fynn Scheben and Ivan G. Graham  

E-Print Network [OSTI]

, modelling transport, scattering and fission, where the dependent variable is the neutron angular fluxIterative methods for neutron transport eigenvalue problems Fynn Scheben and Ivan G. Graham Bath METHODS FOR NEUTRON TRANSPORT EIGENVALUE PROBLEMS FYNN SCHEBEN AND IVAN G. GRAHAM Abstract. We discuss

Graham, Ivan

109

Technological Institute of Renewable Energy ITER | Open Energy Information  

Open Energy Info (EERE)

Renewable Energy ITER Renewable Energy ITER Jump to: navigation, search Name Technological Institute of Renewable Energy (ITER) Place Santa Cruz de Tenerife, Spain Zip 38611 Sector Solar, Wind energy Product Spain-based, technological research and development institute focused on the solar and wind sectors. References Technological Institute of Renewable Energy (ITER)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Technological Institute of Renewable Energy (ITER) is a company located in Santa Cruz de Tenerife, Spain . References ↑ "Technological Institute of Renewable Energy (ITER)" Retrieved from "http://en.openei.org/w/index.php?title=Technological_Institute_of_Renewable_Energy_ITER&oldid=352069

110

Princeton Plasma Physics Lab - U.S. ITER  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

iter U.S. ITER en BBC iter U.S. ITER en BBC Video Looks at ITER http://www.pppl.gov/node/1536

American Fusion News Category: 
iter">U.S. ITER
111

Physics and technology in the ion-cyclotron range of frequency on Tore Supra and TITAN test facility: implication for ITER  

SciTech Connect (OSTI)

To support the design of an ITER ion-cyclotron range of frequency heating (ICRH) system and to mitigate risks of operation in ITER, CEA has initiated an ambitious Research & Development program accompanied by experiments on Tore Supra or test-bed facility together with a significant modelling effort. The paper summarizes the recent results in the following areas: Comprehensive characterization (experiments and modelling) of a new Faraday screen concept tested on the Tore Supra antenna. A new model is developed for calculating the ICRH sheath rectification at the antenna vicinity. The model is applied to calculate the local heat flux on Tore Supra and ITER ICRH antennas. Full-wave modelling of ITER ICRH heating and current drive scenarios with the EVE code. With 20 MW of power, a current of 400 kA could be driven on axis in the DT scenario. Comparison between DT and DT(3He) scenario is given for heating and current drive efficiencies. First operation of CW test-bed facility, TITAN, designed for ITER ICRH components testing and could host up to a quarter of an ITER antenna. R&D of high permittivity materials to improve load of test facilities to better simulate ITER plasma antenna loading conditions.

Litaudon, X [CEA, France; Bernard, J. M. [CEA, IRFM, France; Colas, L. [CEA, France; Dumont, R. J. [CEA Cadarache, St. Paul lex Durance, France; Argouarch, A. [CEA Cadarache, St. Paul lex Durance, France; Bottollier-Curtet, H. [CEA, IRFM, France; Bremond, S. [CEA, IRFM, France; Champeaux, S. [CEA, IRFM, France; Corre, Y. [CEA Cadarache, St. Paul lex Durance, France; Dumortier, P. [ERM-KMS, Association EURATOM-Belgian State, Brussels, Belgium; Firdaouss, M. [CEA, IRFM, France; Guilhem, D. [CEA, IRFM, France; Gunn, J. P. [CEA, IRFM, France; Gouard, Ph. [CEA, DAM, DIF, Arpajon cedex, France; Hoang, G T [CEA, IRFM, France; Jacquot, Jonathan [CEA, IRFM, France; Klepper, C Christopher [ORNL; Kubic, M. [CEA, IRFM, France; Kyrytsya, V. [ERM-KMS, Association EURATOM-Belgian State, Brussels, Belgium; Lombard, G. [CEA, IRFM, France; Milanesio, D. [Politecnico di Torino; Messiaen, A. [ERM-KMS, Association EURATOM-Belgian State, Brussels, Belgium; Mollard, P. [CEA, IRFM, France; Meyer, O. [CEA Cadarache, St. Paul lex Durance, France; Zarzoso, D. [CEA, IRFM, France

2013-01-01T23:59:59.000Z

112

Development and test of the ITER conductor joints  

SciTech Connect (OSTI)

Joints for the ITER superconducting Central Solenoid should perform in rapidly varying magnetic field with low losses and low DC resistance. This paper describes the design of the ITER joint and presents its assembly process. Two joints were built and tested at the PTF facility at MIT. Test results are presented, losses in transverse and parallel field and the DC performance are discussed. The developed joint demonstrates sufficient margin for baseline ITER operating scenarios.

Martovetsky, N., LLNL

1998-05-14T23:59:59.000Z

113

Benchmarking ICRF Full-wave Solvers for ITER  

SciTech Connect (OSTI)

Abstract Benchmarking of full-wave solvers for ICRF simulations is performed using plasma profiles and equilibria obtained from integrated self-consistent modeling predictions of four ITER plasmas. One is for a high performance baseline (5.3 T, 15 MA) DT H-mode. The others are for half-field, half-current plasmas of interest for the pre-activation phase with bulk plasma ion species being either hydrogen or He4. The predicted profiles are used by six full-wave solver groups to simulate the ICRF electromagnetic fields and heating, and by three of these groups to simulate the current-drive. Approximate agreement is achieved for the predicted heating power for the DT and He4 cases. Factor of two disagreements are found for the cases with second harmonic He3 heating in bulk H cases. Approximate agreement is achieved simulating the ICRF current drive.

R. V. Budny, L. Berry, R. Bilato, P. Bonoli, M. Brambilla, R. J. Dumont, A. Fukuyama, R. Harvey, E. F. Jaeger, K. Indireshkumar, E. Lerche, D. McCune, C. K. Phillips, V. Vdovin, J. Wright, and members of the ITPA-IOS

2011-01-06T23:59:59.000Z

114

Design of the ITER ICRF Antenna  

SciTech Connect (OSTI)

The CYCLE consortium has been designing the ITER ICRF antenna since March 2010, supported by an F4E grant. Following a brief introduction to the consortium, this paper: describes the present status and layout of the design; highlights the key mechanical engineering features; shows the expected impact of cooling and radiation issues on the design and outlines the need for future R and D to support the design process. A key design requirement is the need for the mechanical design and analysis to be consistent with all requirements following from the RF physics and antenna layout optimisation. As such, this paper complements that of Durodie et al.

Hancock, D.; Nightingale, M.; Bamber, R.; Dalton, N.; Lister, J.; Porton, M.; Shannon, M.; Wilson, D.; Wooldridge, E. [EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, OX14 5ER (United Kingdom); Durodie, F. [ERM/KMS, Association EURATOM-Belgian State, Brussels (Belgium); Firdaouss, M. [CEA, IRFM, F-1308 Saint-Paul-lez Durance (France); Winkler, K. [Max-Planck Institut fur Plasmaphysik, EURATOM-Assoziation, Garching (Germany)

2011-12-23T23:59:59.000Z

115

Variational Iteration Method for Image Restoration  

E-Print Network [OSTI]

The famous Perona-Malik (P-M) equation which was at first introduced for image restoration has been solved via various numerical methods. In this paper we will solve it for the first time via applying a new numerical method called the Variational Iteration Method (VIM) and the correspondent approximated solutions will be obtained for the P-M equation with regards to relevant error analysis. Through implementation of our algorithm we will access some effective results which are deserved to be considered as worthy as the other solutions issued by the other methods.

Yahya, Keyvan; Azari, Hossein; Fard, Pouyan Rafiei

2010-01-01T23:59:59.000Z

116

TRANSP Tests Of TGLF and Predictions For ITER  

SciTech Connect (OSTI)

Gyro kinetic simulations of turbulence capture some of the features observed in transport, fluctuations, and correlations measured in tokamak plasmas. These codes calculations are CPU intensive, and are not practical for incorporation in present time-dependant transport codes, so reduced models based on these gyro kinetic codes are being used. An example is the TGLF model [1] which is a quasilinear gyrofluid model calibrated to nonlinear results from the GYRO code [2]. Recently TGLF has been incorporated into TRANSP. Analysis of experimental data using TRANSP with such models provides fundamental understanding of turbulent transport. Predictions of ITER performance with various plasma scenarios using such models are useful for optimizing design and for exposing issues that can be addressed in present experiments and theory. For instance, which combinations of heating, torquing, and current drive are optimal. Another application is for nuclear licensing (e.g. system integrity, neutron rates). Others are generating inputs for design of diagnostic systems and for theoretical studies. An example of the later is Alfv´en Eigenmode and AE-induced loss of fast ions. The beam ion distribution can either enhance or reduce the alpha pressure drive of the AE instability. The AE instability can cause dangerous amounts of fast ion losses, as was seen in TFTR.

none,; Budny, Robert; Yuan, Xingqiu

2014-02-26T23:59:59.000Z

117

Diverse Power Iteration Embeddings and Its Applications  

SciTech Connect (OSTI)

Abstract—Spectral Embedding is one of the most effective dimension reduction algorithms in data mining. However, its computation complexity has to be mitigated in order to apply it for real-world large scale data analysis. Many researches have been focusing on developing approximate spectral embeddings which are more efficient, but meanwhile far less effective. This paper proposes Diverse Power Iteration Embeddings (DPIE), which not only retains the similar efficiency of power iteration methods but also produces a series of diverse and more effective embedding vectors. We test this novel method by applying it to various data mining applications (e.g. clustering, anomaly detection and feature selection) and evaluating their performance improvements. The experimental results show our proposed DPIE is more effective than popular spectral approximation methods, and obtains the similar quality of classic spectral embedding derived from eigen-decompositions. Moreover it is extremely fast on big data applications. For example in terms of clustering result, DPIE achieves as good as 95% of classic spectral clustering on the complex datasets but 4000+ times faster in limited memory environment.

Huang H.; Yoo S.; Yu, D.; Qin, H.

2014-12-14T23:59:59.000Z

118

A Comparison of Iterative Multilevel Finite Element Solvers  

E-Print Network [OSTI]

de Janeiro, RJ 21945­970, Brazil Abstract A comparison is made of two iterative algorithms on the energy variation of the incremental correction through the iterative process, which seems to be a more of choice. The increasing computing power reached with vector and parallel computers has renewed

Coutinho, Alvaro L. G. A.

119

A Complete Equational Axiomatization for BPA with Pre x Iteration  

E-Print Network [OSTI]

A Complete Equational Axiomatization for BPA with Pre x Iteration Wan Fokkink & Hans Zantema, in the setting of Basic Process Algebra BPA together with the deadlock from Bergstra and Klop 1984 and the empty in a process algebra equivalent to BPA , including a conditional axiom for iteration from Salomaa 1966, and he

Utrecht, Universiteit

120

Japan, EU reach basic agreement over ITER The Yomiuri Shimbun  

E-Print Network [OSTI]

Japan, EU reach basic agreement over ITER The Yomiuri Shimbun The government and the European Union to the unsuccessful candidate country. Japan and France, the EU's candidate, have been bidding to host the facility bidder's country. The ITER project participants--Japan, China, the EU, Russia, South Korea and the United

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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121

BPO Inputs to ITER Design Review on Pellet Pacing, RMP and RWM Coils,  

E-Print Network [OSTI]

Is a Pressing Issue for ITER Loarte et al., Nuclear Fusion, ITER Physics Basis,Chapter 4 Recent results reducedBPO Inputs to ITER Design Review on Pellet Pacing, RMP and RWM Coils, and Disruption Mitigation

122

Microsoft Word - Second_ ITER Council Press Release.doc  

Broader source: Energy.gov (indexed) [DOE]

Neil Calder Neil Calder Tel: 00 33 (0)6 14 16 41 75 ITER GAINS MOMENTUM Aomori, Japan 18 June 2008 On 17-18 June 2008, the ITER Council, the Governing Body of the new international Organization, convened for its second meeting. The two day meeting in Aomori, Japan, brought together senior representatives from the seven ITER Members: China, the European Union, India, Japan, Korea, Russia and the United States. Mr. Shingo Mimura, Governor of the Aomori Prefecture, welcomed delegates with a reminder of the global significance of the ITER project. "At a time when stable energy supplies and the promotion of strategies to tackle climate change are topics of global concern, the world is watching the ITER project. Implemented by seven parties that together make up half

123

ITER Central Solenoid Coil Insulation Qualification  

SciTech Connect (OSTI)

An insulation system for ITER Central Solenoid must have sufficiently high electrical and structural strength. Design efforts to bring stresses in the turn and layer insulation within allowables failed. It turned out to be impossible to eliminate high local tensile stresses in the winding pack. When high local stresses can not be designed out, the qualification procedure requires verification of the acceptable structural and electrical strength by testing. We built two 4x4 arrays of the conductor jacket with two options of the CS insulation and subjected the arrays to 1.2 million compressive cycles at 60 MPa and at 76 K. Such conditions simulated stresses in the CS insulation. We performed voltage withstand tests and after end of cycling we measured the breakdown voltages between in the arrays. After that we dissectioned the arrays and studied micro cracks in the insulation. We report details of the specimens preparation, test procedures and test results.

Martovetsky, Nicolai N [ORNL] [ORNL; Mann Jr, Thomas Latta [ORNL] [ORNL; Miller, John L [ORNL] [ORNL; Freudenberg, Kevin D [ORNL] [ORNL; Reed, Richard P [Cryogenic Materials, Inc.] [Cryogenic Materials, Inc.; Walsh, Robert P [Florida State University] [Florida State University; McColskey, J D [National Institute of Standards and Technology (NIST), Boulder] [National Institute of Standards and Technology (NIST), Boulder; Evans, D [Advanced Cryogenic Materials] [Advanced Cryogenic Materials

2010-01-01T23:59:59.000Z

124

ITER CENTRAL SOLENOID COIL INSULATION QUALIFICATION  

SciTech Connect (OSTI)

An insulation system for ITER Central Solenoid must have sufficiently high electrical and structural strength. Design efforts to bring stresses in the turn and layer insulation within allowables failed. It turned out to be impossible to eliminate high local tensile stresses in the winding pack. When high local stresses can not be designed out, the qualification procedure requires verification of the acceptable structural and electrical strength by testing. We built two 4 x 4 arrays of the conductor jacket with two options of the CS insulation and subjected the arrays to 1.2 million compressive cycles at 60 MPa and at 76 K. Such conditions simulated stresses in the CS insulation. We performed voltage withstand tests and after end of cycling we measured the breakdown voltages between in the arrays. After that we dissectioned the arrays and studied micro cracks in the insulation. We report details of the specimens preparation, test procedures and test results.

Martovetsky, N N; Mann, T L; Miller, J R; Freudenberg, K D; Reed, R P; Walsh, R P; McColskey, J D; Evans, D

2009-06-11T23:59:59.000Z

125

A.C.C. Sips, Advanced scenarios for ITER operation ICPP 2004 Advanced scenarios for ITER operation  

E-Print Network [OSTI]

of fusion energy. ITER is to produce and study plasmas dominated by self heating. This would give unique@ipp.mpg.de Abstract In thermonuclear fusion research using magnetic confinement, the tokamak is the leading candidate to provide a #12;A.C.C. Sips, Advanced scenarios for ITER operation ICPP 2004 2 better understanding, control

Paris-Sud XI, Université de

126

Iterative Estimationof Antarctic Sea Ice Extent Using SeaWindsData QuinnP. Remund and David G. Long  

E-Print Network [OSTI]

an importantcomponent in global geophysical processes. For example, the insulating nature of sea ice impedes heatIterative Estimationof Antarctic Sea Ice Extent Using SeaWindsData QuinnP. Remund and David G. Long-378-4383,FAX: 801-378-6586 Abstract- Polar sea ice extent is an important input to global climate models

Long, David G.

127

Science and Technology Research and Development in Support to ITER and the Broader Approach at CEA  

SciTech Connect (OSTI)

In parallel to the direct contribution to the procurement phase of ITER and Broader Approach, CEA has initiated research & development programmes, accompanied by experiments together with a significant modelling effort, aimed at ensuring robust operation, plasma performance, as well as mitigating the risks of the procurement phase. This overview reports the latest progress in both fusion science and technology including many areas, namely the mitigation of superconducting magnet quenches, disruption-generated runaway electrons, edge-localized modes (ELMs), the development of imaging surveillance, and heating and current drive systems for steady-state operation. The WEST (W Environment for Steady-state Tokamaks) project, turning Tore Supra into an actively cooled W-divertor platform open to the ITER partners and industries, is presented.

Becoulet, A. [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance] [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance; Hoang, G T [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM)] [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM); Abiteboul, J. [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance] [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance; Achard, J. [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance] [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance; Alarcon, T. [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance] [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance; Klepper, C Christopher [ORNL] [ORNL

2013-01-01T23:59:59.000Z

128

RF heating needs and plans for ITER  

SciTech Connect (OSTI)

RF heating systems are required to deliver more than half of the total auxiliary power to operate ITER successfully through the different levels. To achieve this goal, systems in the range of ICRF, LHF and ECRF will be implemented for different tasks in different phases of operation. Power levels proposed to be used in different ranges will vary depending on the needs. Different mixes of power will depend on the physics needs of the experimental programmes. Lower Hybrid power of 20 MW at 5.0 GHz is not planned for the startup phase and therefore no procurement scheme exists at the present time. 20 MW will be delivered into the plasma at 40 to 55 MHz as well as at 170 GHz with the help of Ion Cyclotron Heating (ICH) and Electron Cyclotron Heating (ECH) systems respectively. All the heating systems will have the capability to operate in continuous mode. A dedicated ECH 3.0 MW system at 127.6 GHz will be used for plasma breakdown and start up.

Bora, Dhiraj; Beaumont, B.; Kobayashi, N.; Tanga, A. [ITER Organization, Joint Work Site, Cadarache (France); Goulding, R.; Swain, D. [Oak Ridge National Laboratory (United States); Jacquinot, J. [Cabinet of High Commissioner for Atomic Energy, CEA Gif-sur-Yvette (France)

2007-09-28T23:59:59.000Z

129

United States and International Partners Initial ITER Agreement |  

Broader source: Energy.gov (indexed) [DOE]

International Partners Initial ITER Agreement International Partners Initial ITER Agreement United States and International Partners Initial ITER Agreement May 24, 2006 - 10:48am Addthis Paves the Way for Large-Scale, Clean Fusion Energy Project BRUSSELS, BELGIUM - Representing the United States, Dr. Raymond L. Orbach, Director of the U.S. Department of Energy's (DOE) Office of Science, joined counterparts from China, the European Union, India, Japan, the Republic of Korea, and the Russian Federation today to initial an agreement to construct ITER, an international fusion energy project. Fusion energy is an important component of President Bush's Advanced Energy Initiative (AEI), given fusion's potential to become an attractive long-range option for the U.S. clean energy portfolio. In FY 2006, DOE allocated $25

130

PPPL's Rich Hawryluk recognized for service to ITER international...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

experiment that is under construction in France. Hawryluk, a former deputy director of PPPL, completed a two-year assignment at ITER in April, 2013. The Secretary of Energy's...

131

1 10/17/2013 US ITER Project  

E-Print Network [OSTI]

1 10/17/2013 US ITER Project CS Magnets and TF Conductor Wayne Reiersen WBS Team Leader, PPPL Neumeyer WBS Team Leader, PPPL Diagnostics David Johnson WBS Team Leader, PPPL Standard Vacuum Components

132

PPPL3246 Preprint: April 1997, UC420 THE PHYSICS ROLE OF ITER  

E-Print Network [OSTI]

­scale plasma physics research. First and foremost, experiments in ITER will explore ``controlled ignition

133

Design of the ITER First Wall and Blanket A. Rene Raffray  

E-Print Network [OSTI]

Design of the ITER First Wall and Blanket A. Rene Raffray TKM, Internal Components Division ITER-mail: mario.merola@iter.org Abstract--This paper summarizes the status of the ITER blanket system design and describes some of the key R&D activities in support of the design with the goal of starting procurement

Raffray, A. René

134

ITER: The International Thermonuclear Experimental Reactor and the Nuclear Weapons Proliferation  

E-Print Network [OSTI]

militarytechnical reasons and implications of the very probable siting of ITER (the International Thermonuclear

André Gsponer; Jean-pierre Hurni

2004-01-01T23:59:59.000Z

135

Numerical simulations of welds of thick steel pieces of interest for the thermonuclear fusion ITER machine  

E-Print Network [OSTI]

Numerical simulations of welds of thick steel pieces of interest for the thermonuclear fusion ITER machine

Carmignani, B

2005-01-01T23:59:59.000Z

136

An iterative semi-implicit scheme with robust damping  

Science Journals Connector (OSTI)

An efficient, iterative semi-implicit (SI) numerical method for the time integration of stiff wave systems is presented. Physics-based assumptions are used to derive a convergent iterative formulation of the SI scheme which enables the monitoring and ... Keywords: 52.30Ex, 52.35Hr, 52.35Py, 52.35Vd, 52.65Tt, Dispersive plasma waves, Gyrofluid, Magnetic reconnection, Robust damping, Semi-implicit methods, Symplectic methods

N. F. Loureiro; G. W. Hammett

2008-04-01T23:59:59.000Z

137

Benchmarking ICRF full-wave solvers for ITER  

Science Journals Connector (OSTI)

Benchmarking full-wave solvers for ion-cyclotron range of frequency (ICRF) simulations is performed using plasma profiles and equilibria obtained from integrated self-consistent modelling predictions of four ITER plasmas. One is for a high-performance baseline (5.3?T, 15?MA) DT H-mode. The others are for half-field, half-current plasmas of interest for the pre-activation phase with bulk plasma ion species being either hydrogen or He4. The predicted profiles are used by six full-wave solver groups to simulate the ICRF electromagnetic fields and heating, and by three of these groups to simulate the current drive. Approximate agreement is achieved by four of the solvers for the heating power partitions for the DT and He4 cases. Factor of two or more disagreements are found for the heating power partitions for the cases with second harmonic He3 heating in bulk H cases. Approximate agreement is achieved simulating the ICRF current-drive 1D profiles.

R.V. Budny; L. Berry; R. Bilato; P. Bonoli; M. Brambilla; R.J. Dumont; A. Fukuyama; R. Harvey; E.F. Jaeger; K. Indireshkumar; E. Lerche; D. McCune; C.K. Phillips; V. Vdovin; J. Wright; members of the ITPA-IOS

2012-01-01T23:59:59.000Z

138

Second performance assessment iteration of the Greater Confinement Disposal facility at the Nevada Test Site  

SciTech Connect (OSTI)

The Greater Confinement Disposal (GCD) facility was established in Area 5 at the Nevada Test Site for containment of waste inappropriate for shallow land burial. Some transuranic (TRU) waste has been disposed of at the GCD facility, and compliance of this disposal system with EPA regulation 40 CFR 191 must be evaluated. We have adopted an iterative approach in which performance assessment results guide site data collection, which in turn influences the parameters and models used in performance assessment. The first iteration was based upon readily available data, and indicated that the GCD facility would likely comply with 40 CFR 191 and that the downward flux of water through the vadose zone (recharge) had a major influence on the results. Very large recharge rates, such as might occur under a cooler, wetter climate, could result in noncompliance. A project was initiated to study recharge in Area 5 by use of three environmental tracers. The recharge rate is so small that the nearest groundwater aquifer will not be contaminated in less than 10,000 years. Thus upward liquid diffusion of radionuclides remained as the sole release pathway. This second assessment iteration refined the upward pathway models and updated the parameter distributions based upon new site information. A new plant uptake model was introduced to the upward diffusion pathway; adsorption and erosion were also incorporated into the model. Several modifications were also made to the gas phase radon transport model. Plutonium solubility and sorption coefficient distributions were changed based upon new information, and on-site measurements were used to update the moisture content distributions. The results of the assessment using these models indicate that the GCD facility is likely to comply with all sections of 40 CFR 191 under undisturbed conditions.

Baer, T.A.; Emery, J.N. [GRAM, Inc., Albuquerque, NM (United States); Price, L.L. [Science Applications International Corp., Albuquerque, NM (United States); Olague, N.E. [Sandia National Labs., Albuquerque, NM (United States)

1994-04-01T23:59:59.000Z

139

The Arabidopsis COP9 Signalosome Subunit 7 Is a Model PCI Domain Protein with Subdomains Involved in COP9 Signalosome Assembly  

Science Journals Connector (OSTI)

...full had a 8xHis tag fused to the N terminus. PCR was used to engineer a TEV protease cleavage site as described (Dessau et al...whose output gave a 2.1 a electron density map of high quality. A model was built using ARP/wARP (Morris et al., 2003...

Moshe Dessau; Yair Halimi; Tamir Erez; Orna Chomsky-Hecht; Daniel A. Chamovitz; Joel A. Hirsch

2008-10-14T23:59:59.000Z

140

Analysis of Amino Acid Residues Involved in Catalysis of Polyethylene Glycol Dehydrogenase from Sphingopyxis terrae, Using Three-Dimensional Molecular Modeling-Based Kinetic Characterization of Mutants  

Science Journals Connector (OSTI)

...approaches the active site from the interface of each monomeric protein, it is stabilized...a quinone binding site close to the interface between NUOD and NUOB subunits of complex...Sphingopyxis terrae, using three-dimensional molecular modeling-based kinetic characterization...

Takeshi Ohta; Takeshi Kawabata; Ken Nishikawa; Akio Tani; Kazuhide Kimbara; Fusako Kawai

2006-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Shut-down dose rate analyses for the ITER electron cyclotron-heating upper launcher  

Science Journals Connector (OSTI)

Abstract The electron cyclotron resonance heating upper launcher (ECHUL) is going to be installed in the upper port of the ITER tokamak thermonuclear fusion reactor for plasma mode stabilization (neoclassical tearing modes and the sawtooth instability). The paper reports the latest neutronic modeling and analyses which have been performed for the ITER reference front steering launcher design. It focuses on the port accessibility after reactor shut-down for which dose rate (SDDR) distributions on a fine regular mesh grid were calculated. The results are compared to those obtained for the ITER Dummy Upper Port. The calculations showed that the heterogeneous ECHUL design gives rise to enhanced radiation streaming as compared to the homogenous dummy upper port. Therefore the used launcher geometry was upgraded to a more recent development stage. The inter-comparison shows a significant improvement of the launchers shielding properties but also the necessity to further upgrade the shielding performance. Furthermore, the analysis for the homogenous dummy upper port, which represents optimal shielding inside the launcher, demonstrates that the shielding upgrade also needs to include the launcher's environment.

Bastian Weinhorst; Arkady Serikov; Ulrich Fischer; Lei Lu; Peter Spaeh; Dirk Strauss

2014-01-01T23:59:59.000Z

142

Negative Ion Based Heating and Diagnostic Neutral Beams for ITER  

SciTech Connect (OSTI)

To meet the requirements of the four operating and one start-up scenarios foreseen in the International Tokamak Experimental Reactor (ITER) a flexible heating mix will be required, which has to include a reliable contribution from neutral beams. The current baseline of ITER foresees 2 Heating Neutral Beam (HNB) systems based on negative ion technology, each operating at 1 MeV 40 A D{sup -} ions, and each capable of delivering up to 16.7 MW of D deg. to the ITER plasma. A 3rd HNB injector is foreseen as an upgrade option. In addition a dedicated Diagnostic Neutral Beam (DNB) injecting 100 keV 60 A of negative hydrogen ions will be available for charge exchange resonant spectroscopy (CXRS). The significant R and D effort necessary to meet the design requirements will be provided in the Neutral Beam Test Facility (NBTF), which is to be constructed in Padua, Italy. This paper gives an overview of the current status of the neutral beam (NB) systems and the chosen configuration. The ongoing integration effort into the ITER plant is highlighted and open interface issues are identified. It is shown how installation and maintenance logistics has influenced the design. ITER operating scenarios are briefly discussed, including start-up and commissioning. For example it is now envisaged to have a low current hydrogen phase of ITER operations, essentially for commissioning of the many auxiliary systems used on ITER. The low current limits the achievable plasma density, and hence the NB energy due to shine through limitations. Therefore a possible reconfiguration of the auxiliary heating systems is now being discussed. Other NB related issues identified by the ongoing design review process are emphasized and possible impact on the implementations of the HNB and DNB systems is indicated.

Schunke, B.; Bora, D.; Cordier, J.-J.; Hemsworth, R.; Tanga, A. [ITER Organization, Cadarache, 13108 St.-Paul-lez-Durance (France); Antoni, V. [Consorzio RFX, EURATOM-ENEA Association, Corso Stati Uniti 4, I-35127 (Italy); Bonicelli, T. [IPR, Bhat, Gandhinagar, Gujarat, 382428 (India); Chakraborty, A. [EFDA CSU, Boltzmannstrasse 2, D-85748, Garching (Germany); Inoue, T.; Watanabe, K. [JAEA, 801-1 Mukouyama, Naka-machi, Naka-gun, Ibaraki-ken 311-0193 (Japan)

2008-04-07T23:59:59.000Z

143

ASI Student Involvement Outcomes ASI Student Involvement Outcomes  

E-Print Network [OSTI]

ASI Student Involvement Outcomes ASI Student Involvement Outcomes A student involved in the activities, programs, and services of the Associated Students, CSUF, Inc. develops and demonstrates achievement in the following (adopted from the University of Minnesota Student Success Outcomes

de Lijser, Peter

144

A Recommendation System for Preconditioned Iterative Solvers  

E-Print Network [OSTI]

. . . . . . . . . . . 162 c. Model Analysis . . . . . . . . . . . . . . . . . . . . 167 3. Performance Modeling . . . . . . . . . . . . . . . . . . . 168 a. Results on New Trials Over Train Matrices . . . . . . 169 b. Results on Unseen Test Matrices... . . . . . . . . . . . 169 c. Model Analysis . . . . . . . . . . . . . . . . . . . . 172 4. Top-k Recommendations . . . . . . . . . . . . . . . . . . 180 a. Results on New Trials Over Train Matrices . . . . . . 180 b. Results on Unseen Test Matrices . . . . . . . . . . . 188...

George, Thomas

2011-02-22T23:59:59.000Z

145

President Bush Issues Executive Order Designating ITER International Fusion  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

President President Bush Issues Executive Order Designating ITER International Fusion Energy Organization A Public Interest Organization News Featured Articles Science Headlines 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Presentations & Testimony News Archives Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 11.19.07 President Bush Issues Executive Order Designating ITER International Fusion Energy Organization A Public Interest Organization Print Text Size: A A A Subscribe FeedbackShare Page November 19, 2007 The White House today announced that President Bush has issued an Executive Order designating the ITER International Fusion Energy Organization as a public international organization. For the purposes of the International

146

Is Carbon a Realistic Choice for ITER's Divertor?  

SciTech Connect (OSTI)

Tritium retention by co-deposition with carbon on the divertor target plate is predicted to limit ITER's DT burning plasma operations (e.g. to about 100 pulses for the worst conditions) before the in-vessel tritium inventory limit, currently set at 350 g, is reached. At this point, ITER will only be able to continue its burning plasma program if technology is available that is capable of rapidly removing large quantities of tritium from the vessel with over 90% efficiency. The removal rate required is four orders of magnitude faster than that demonstrated in current tokamaks. Eighteen years after the observation of co-deposition on JET and TFTR, such technology is nowhere in sight. The inexorable conclusion is that either a major initiative in tritium removal should be funded or that research priorities for ITER should focus on metal alternatives.

C.H. Skinner; G. Federici

2005-05-13T23:59:59.000Z

147

Tooling concepts for ITER tokamak assembly and remote disassembly  

SciTech Connect (OSTI)

Since ITER has many of the characteristics of a full-scale tokamak reactor, its provisions for assembly and replaceability are relevant to a future fusion power plant. The performance of ITER is dependent on tight tolerances, mainly for the magnets and plasma facing components. The magnetic field must be highly uniform in the toroidal direction to ensure good plasma energy and particle confinement. Alignment of the plasma facing surface of the first wall and divertor target plates is required to avoid large local heat loads on the plasma facing components and, as a consequence, their erosion and contamination of the plasma with impurities. Because of the large and heavy components the major challenge of the ITER tokamak assembly is to hold such tight tolerances using guide tools, adjustable interfaces, accurate measuring tools, and specific procedures to compensate for deformation and fabrication tolerances. The assembly tooling plan also includes verification of the essential remote handling operations.

Oikawa, A.; Puhn, F.; Helary, J.L.; Shaw, R.; Friend, M.; Piec, Z.; Tachikawa, N.; Acks, M.; Basile, A.

1995-12-31T23:59:59.000Z

148

Iterative methods for solving nonlinear problems of nuclear reactor criticality  

SciTech Connect (OSTI)

The paper presents iterative methods for calculating the neutron flux distribution in nonlinear problems of nuclear reactor criticality. Algorithms for solving equations for variations in the neutron flux are considered. Convergence of the iterative processes is studied for two nonlinear problems in which macroscopic interaction cross sections are functionals of the spatial neutron distribution. In the first problem, the neutron flux distribution depends on the water coolant density, and in the second one, it depends on the fuel temperature. Simple relationships connecting the vapor content and the temperature with the neutron flux are used.

Kuz'min, A. M., E-mail: mephi.kam@mail.ru [National Research Nuclear University MEPhI (Russian Federation)

2012-12-15T23:59:59.000Z

149

Iterative reconstruction of the detector response for medical gamma cameras  

E-Print Network [OSTI]

Statistical event reconstruction techniques can give better results for gamma cameras than the traditional centroid method. However, implementation of such techniques requires detailed knowledge of the PMT light response functions. Here we describe an iterative technique which allows to obtain the response functions from flood irradiation data without imposing strict requirements on the spatial uniformity of the event distribution. A successful application of the technique for medical gamma cameras is demonstrated using both simulated and experimental data. We show that this technique can be used for monitoring of the photomultiplier gain variations. An implementation of the iterative reconstruction technique capable of operating in real-time is also presented.

Morozov, A; Alves, F; Domingos, V; Martins, R; Neves, F; Chepel, V

2015-01-01T23:59:59.000Z

150

Brussels advocates a lone rider for ITER 09/22/2004 Edition  

E-Print Network [OSTI]

can advance alone to establish the thermonuclear reactor experimental ITER in Cadarache. France in the construction of the future experimental thermonuclear reactor ITER, if Brussels does not manage to convince

151

Iterative improvement to solve the parcel hub scheduling problem  

Science Journals Connector (OSTI)

This paper presents iterative improvement algorithms to solve the parcel hub scheduling problem (PHSP). The PHSP is combinatorial optimization problem that consists of scheduling a set of inbound trailers to a small number of unload docks. At the unload ... Keywords: Cross docks, Genetic algorithms, Local search, Parcel delivery industry, Simulated annealing

Douglas L. McWilliams

2010-08-01T23:59:59.000Z

152

Basic Process Algebra with Iteration: Completeness of its Equational Axioms  

E-Print Network [OSTI]

& Ponse [BBP93] incorporated the binary Kleene star into Basic Process Algebra (BPA), and called it single exit iteration (SEI). They suggested three axioms SEI1­3 for BPA \\Lambda , where axiom SEI1 is the one­3, together with the axioms A1­5 for BPA, form a complete axiomatisation for BPA \\Lambda with respect

Utrecht, Universiteit

153

About the Limiting Behaviour of Iterated Robust Morphological Operators  

E-Print Network [OSTI]

Guanajuato, Gto., Mexico horebeek@cimat.mx 2 Freie Universitat Berlin, Institut fur Informatik Tacostr. 9 of morphological operators. To this purpose, we describe the implied iterative process by a discrete dynamical morphology is an important branch of non-linear signal process- ing. It has its roots in discrete geometry

Van Horebeek, Johan

154

ACCELERATED SPATIO-TEMPORAL WAVELET TRANSFORMS: AN ITERATIVE TRAJECTORY ESTIMATION. *  

E-Print Network [OSTI]

ACCELERATED SPATIO-TEMPORAL WAVELET TRANSFORMS: AN ITERATIVE TRAJECTORY ESTIMATION. * Jean accelerated motion in spatio-temporal discrete sig- nals. It is assumed that the digital signals of inter- est, they contain all the orders of acceleration. The purpose of this work is to estimate the trajectory

Wickerhauser, M. Victor

155

ICRF scenarios for ITER's half-field phase  

SciTech Connect (OSTI)

The non-active operation phase of ITER will be done in H and {sup 4}He plasmas at half the nominal magnetic field, B{sub 0} = 2.65T. At this field and for the given frequency range of the ICRF system (f = 40-55MHz), three ICRF heating scenarios are available a priori: (i) Fundamental ICRH of majority H plasmas at f{approx_equal}40MHz,(ii) second harmonic (N= 2) {sup 3}He ICRH in H plasmas at f{approx_equal}53MHz and (iii) fundamental minority H heating in {sup 4}He plasmas at f{approx_equal}40MHz. While the latter is expected to perform well for not too large H concentrations, the heating scenarios available for the Hydrogen plasmas are less robust. Recent JET experiments performed in similar conditions to those expected in ITER's half-field phase confirmed the low performance of these two scenarios and numerical simulations have shown that the situation is not much improved in ITER, mainly because of the rather modest plasma temperature and density expected in its initial operation phase. A summary of the main experimental results obtained at JET followed by numerical predictions for ITER's half-field ICRF heating scenarios will be presented.

Lerche, E.; Van Eester, D.; Ongena, J. [LPP-ERM/KMS, Association Euratom-'Belgian State', TEC Partner, Brussels (Belgium); Mayoral, M.-L.; Giroud, C.; Jacquet, P.; Kiptily, V. [Euratom-CCFE Fusion Association, Culham Science Centre (United Kingdom); Johnson, T.; Hellsten, T. [Fusion Plasma Physics, Association Euratom-VR, KTH, Stockholm (Sweden); Bilato, R. [IPP (MPI)-Euratom Association, Garching (Germany); Czarnecka, A. [Institute of Plasma Physics and Laser Microfusion, Warsaw (Poland); Dumont, R. [CEA (IRFM)-Euratom Association, Saint-Paul-lez-Durance (France); Krasilnikov, A. [SRC RF Troitsk Institute for Innovating and Fusion Research, Troitsk (Russian Federation); Maslov, M. [Centre de Recherches en Physique des Plasmas, Association EURATOM - Suisse, Lausanne (Switzerland); Vdovin, V. [RNC Kurchatov Institute, Nuclear Fusion Institute, Moscow (Russian Federation)

2011-12-23T23:59:59.000Z

156

ACCELERATING REGULARIZED ITERATIVE CT RECONSTRUCTION ON COMMODITY GRAPHICS HARDWARE (GPU)  

E-Print Network [OSTI]

overhead to very moderate levels. Index Terms-- Iterative Reconstruction, Computed Tomography, Ordered Klaus Mueller Center for Visual Computing, Computer Science Department, Stony Brook University ABSTRACT) is the overall theme in many efforts to lower these exposures. Effective methods here include limiting either

Mueller, Klaus

157

PTRANSP Tests of TGLF and Predictions for ITER  

SciTech Connect (OSTI)

A new numerical solver for stiff transport predictions has been developed and implemented in the PTRANSP predictive transport code. The TGLF and GLF23 predictive codes have been incorporated in the solver, verified by comparisons with predictions from the XPTOR code, and validated by comparing predicted and measured profiles. Predictions for ITER baseline plasmas are presented.

Robert V. Budny, Xingqiu Yuan, S. Jardin, G. Hammett, G. Staebler, J. Kinsey, members of the ITPA Transport and Confinement Topical Group, and JET EFDA Contributors

2012-09-23T23:59:59.000Z

158

Japan rejects EU ITER deal 02 February 2005  

E-Print Network [OSTI]

News Japan rejects EU ITER deal 02 February 2005 An offer from the EU for Japan to drop its bid preferential issuance of orders to Japanese companies. Japan had previously proposed to issue about $Y57 authority to issue orders to Japanese firms and a distinct difference between the two proposals. Japan

159

PPPL-3246 -Preprint: April 1997, UC-420 THE PHYSICS ROLE OF ITER  

E-Print Network [OSTI]

. INTRODUCTION The ITER plasma will provide a unique opportunity for reactor-scale plasma physics research. First

160

Thermomechanical Performance of the EU TBMs Under a Typical ITER Transient  

Science Journals Connector (OSTI)

ITER Systems / Proceedings of the Nineteenth Topical Meeting on the Technology of Fusion Energy (TOFE) (Part 1)

F. Cismondi; G. Aiello; S. Kecskes; G. Rampal

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Joint News Release CHINA AND THE U.S. JOIN ITER NEGOTIATIONS  

E-Print Network [OSTI]

to the importance of ITER both in the Summit meeting with President Putin and in his speech at the Kurchatov

162

High Heat Flux Test of the KO Standard Mockups for ITER First Wall Semi-Prototype  

Science Journals Connector (OSTI)

ITER Systems / Proceedings of the Nineteenth Topical Meeting on the Technology of Fusion Energy (TOFE) (Part 1)

Suk-Kwon Kim et al.

163

A spatial multigrid iterative method for two-dimensional discrete-ordinates transport problems  

E-Print Network [OSTI]

One example of a preconditioned, iterative transport method is Diffusion Synthetic Acceleration (DSA). DSA begins with one transport sweep, or source iteration, identical to Eq. (1.12) for an intermediate angular flux iteration. This intermediate... to compute the next scattering source, Eq. (1.16), to be substituted back into Eq. (1.12): ()() ( ) () ( ) ( )11/21nn n++ +x. (1.16) The superiority of DSA over source iteration is made very clear by the Fourier analysis of the homogeneous, infinite...

Lansrud, Brian David

2005-08-29T23:59:59.000Z

164

ANALYSES AND PRELIMINARY RESULTS OF AN UPDATED ITER RADIOACTIVE WASTE ASSESSMENT  

E-Print Network [OSTI]

ANALYSES AND PRELIMINARY RESULTS OF AN UPDATED ITER RADIOACTIVE WASTE ASSESSMENT S. ZHENG,a * R aimed at updating the ITER radioactive inventory assessment and assisting the waste manage- ment operations, and waste management processes and services. KEYWORDS: ITER, radioactive waste management

165

36.th EPS-CPP, June 30.th 2009 -Sofia ITER Session  

E-Print Network [OSTI]

36.th EPS-CPP, June 30.th 2009 - Sofia ITER Session F. Zonca - The FAST Proposal Associazione Tor Vergata Univ. of Catania #12;36.th EPS-CPP, June 30.th 2009 - Sofia ITER Session F. Zonca & construction #12;36.th EPS-CPP, June 30.th 2009 - Sofia ITER Session F. Zonca - The FAST Proposal Associazione

Zonca, Fulvio

166

A turbulent transport network model in MULTIFLUX coupled with TOUGH2  

SciTech Connect (OSTI)

A new numerical method is described for the fully iterated, conjugate solution of two discrete submodels, involving (a) a transport network model for heat, moisture, and airflows in a high-permeability, air-filled cavity; and (b) a variably saturated fractured porous medium. The transport network submodel is an integrated-parameter, computational fluid dynamics solver, describing the thermal-hydrologic transport processes in the flow channel system of the cavity with laminar or turbulent flow and convective heat and mass transport, using MULTIFLUX. The porous medium submodel, using TOUGH2, is a solver for the heat and mass transport in the fractured rock mass. The new model solution extends the application fields of TOUGH2 by integrating it with turbulent flow and transport in a discrete flow network system. We present demonstrational results for a nuclear waste repository application at Yucca Mountain with the most realistic model assumptions and input parameters including the geometrical layout of the nuclear spent fuel and waste with variable heat load for the individual containers. The MULTIFLUX and TOUGH2 model elements are fully iterated, applying a programmed reprocessing of the Numerical Transport Code Functionalization model-element in an automated Outside Balance Iteration loop. The natural, convective airflow field and the heat and mass transport in a representative emplacement drift during postclosure are explicitly solved in the new model. The results demonstrate that the direction and magnitude of the air circulation patterns and all transport modes are strongly affected by the heat and moisture transport processes in the surrounding rock, justifying the need for a coupled, fully iterated model solution such as the one presented in the paper.

Danko, G.; Bahrami, D.; Birkholzer, J.T.

2011-02-15T23:59:59.000Z

167

US ITER is a strong contributor in plan to enhance international sharing of  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

US ITER is a strong contributor in plan to enhance international sharing of US ITER is a strong contributor in plan to enhance international sharing of prime ITER real estate By Lynne Degitz, US ITER March 28, 2013 Tweet Widget Facebook Like Google Plus One PPPL's Russell Feder, left, and David Johnson developed key features for a modular approach to housing the extensive diagnostic systems that will be installed on the ITER tokamak. (Photo by Elle Starkman/PPPL Office of Communications) PPPL's Russell Feder, left, and David Johnson developed key features for a modular approach to housing the extensive diagnostic systems that will be installed on the ITER tokamak. Gallery: Diagram of an equatorial port plug shows the three vertical diagnostic shield modules with detachable first wall blocks. The modular approach has many advantages including efficient design collaboration, easier maintenance and the possibility for future upgrades to the ITER diagnostic systems.

168

Half a century of fusion research towards ITER  

Science Journals Connector (OSTI)

A review is given on plasma physics and controlled thermonuclear fusion research since the late 1950s and up to the present day. Special emphasis is given to various proposed magnetic plasma confinement systems, as well as to the research aiming at the planned International Thermonuclear Experimental Reactor (ITER) project. The latter is based on the tokamak field geometry of a strong toroidal magnetic field, combined with an inductively imposed toroidal plasma current. Experimental and theoretical research has been conducted on the fundamental problems of confinement, equilibrium, stability, plasma transport and plasma heating. During this development two milestones have been passed on the way to ITER, namely the removed threat by Bohm diffusion at the end of the 1960s, and the discovery of the High Mode at the beginning of the 1980s. Finally, some future perspectives are shortly given on this line of research.

Bo Lehnert

2013-01-01T23:59:59.000Z

169

Iterative Entanglement Distillation: Approaching full Elimination of Decoherence  

E-Print Network [OSTI]

The distribution and processing of quantum entanglement form the basis of quantum communication and quantum computing. The realization of the two is difficult because quantum information inherently has a high susceptibility to decoherence, i.e. to uncontrollable information loss to the environment. For entanglement distribution, a proposed solution to this problem is capable of fully eliminating decoherence; namely iterative entanglement distillation. This approach builds on a large number of distillation steps each of which extracts a number of weakly decohered entangled states from a larger number of strongly decohered states. Here, for the first time, we experimentally demonstrate iterative distillation of entanglement. Already distilled entangled states were further improved in a second distillation step and also made available for subsequent steps.Our experiment displays the realization of the building blocks required for an entanglement distillation scheme that can fully eliminate decoherence.

Boris Hage; Aiko Samblowski; James DiGuglielmo; Jaromír Fiurášek; Roman Schnabel

2010-07-09T23:59:59.000Z

170

Iterative solution of ordinary differential equations with polynomial coefficients  

E-Print Network [OSTI]

ITERATIVE SOLUTION OF ORDINARY DIFFERENTIAL EQUATIONS WITH POLYNOMIAL COEFFICIENTS A Thesis By JIMMIE CHARLES RHEA FOREHAND Submitted to the Graduate College of the Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE August 1965 Major Subject Mathematics FAMILIES OF FIFTH ORDER RUNGE-KUTTA FORMULAS A Thesis By HARRY PAUL KONEN 4 0 0 IXI v 0 Approved as to style and content by: (Chairman of Committee) (Head of Departmen...

Forehand, Jimmie Charles Rhea

1965-01-01T23:59:59.000Z

171

Improved criticality convergence via a modified Monte Carlo iteration method  

SciTech Connect (OSTI)

Nuclear criticality calculations with Monte Carlo codes are normally done using a power iteration method to obtain the dominant eigenfunction and eigenvalue. In the last few years it has been shown that the power iteration method can be modified to obtain the first two eigenfunctions. This modified power iteration method directly subtracts out the second eigenfunction and thus only powers out the third and higher eigenfunctions. The result is a convergence rate to the dominant eigenfunction being |k{sub 3}|/k{sub 1} instead of |k{sub 2}|/k{sub 1}. One difficulty is that the second eigenfunction contains particles of both positive and negative weights that must sum somehow to maintain the second eigenfunction. Summing negative and positive weights can be done using point detector mechanics, but this sometimes can be quite slow. We show that an approximate cancellation scheme is sufficient to accelerate the convergence to the dominant eigenfunction. A second difficulty is that for some problems the Monte Carlo implementation of the modified power method has some stability problems. We also show that a simple method deals with this in an effective, but ad hoc manner.

Booth, Thomas E [Los Alamos National Laboratory; Gubernatis, James E [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

172

Progress and present status of ITER cryoline system  

SciTech Connect (OSTI)

The cryoline system at ITER forms a very complex network localized inside the Tokamak building, on a dedicated plant bridge and in cryoplant areas. The cooling power produced in the cryoplant is distributed via these lines with a total length of about 3.7 km and interconnecting all the cold boxes of the cryogenic system as well as the cold boxes of various clients (magnets, cryopumps and thermal shield). Distinct layouts and polygonal geometry, nuclear safety and confinement requirements, difficult installation and in-service inspection/repair demand very high reliability and availability for the cryolines. The finalization of the building-embedded plates for supporting the lines, before the detailed design, has made this project technologically more challenging. The conceptual design phase has been completed and procurement arrangements have been signed with India, responsible for providing the system of cryolines and warm lines to ITER, as in kind contribution. The prototype test for the design and performance validation has been planned on a representative cryoline section. After describing the basic features and general layout of the ITER cryolines, the paper presents key design requirements, conceptual design approach, progress and status of the cryolines project as well as challenges to build such a complex cryoline system.

Badgujar, S.; Bonneton, M.; Chalifour, M.; Forgeas, A.; Serio, L. [ITER Organization, Route de Vinon sur Verdon, 13115 St. Paul lez Durance (France); Sarkar, B.; Shah, N. [ITER-India, Institute for Plasma Research, Bhat, Gandhinagar 382428 (India)

2014-01-29T23:59:59.000Z

173

U.S.Statements on International Fusion Reactor (ITER) Siting Decision |  

Broader source: Energy.gov (indexed) [DOE]

U.S.Statements on International Fusion Reactor (ITER) Siting U.S.Statements on International Fusion Reactor (ITER) Siting Decision U.S.Statements on International Fusion Reactor (ITER) Siting Decision June 28, 2005 - 1:45pm Addthis WASHINGTON, DC - Today in Moscow, Russia, the ministers representing the six ITER parties, including Dr. Raymond L. Orbach, Director of the U.S. Department of Energy's Office of Science, announced the ITER international fusion reactor will be located at the EU site in Cadarache, France. Below are statements by U.S. government officials following the signing of the agreement at the Ministerial Meeting. The text of the announcement by the six parties is available at www.iter.org/index_newsroom.htm. Statement by U.S. Secretary of Energy Samuel W. Bodman: "Plentiful, reliable energy is critical to continued worldwide economic

174

On choosing a nonlinear initial iterate for solving the 2-D 3-T heat conduction equations  

SciTech Connect (OSTI)

The 2-D 3-T heat conduction equations can be used to approximately describe the energy broadcast in materials and the energy swapping between electron and photon or ion. To solve the equations, a fully implicit finite volume scheme is often used as the discretization method. Because the energy diffusion and swapping coefficients have a strongly nonlinear dependence on the temperature, and some physical parameters are discontinuous across the interfaces between the materials, it is a challenge to solve the discretized nonlinear algebraic equations. Particularly, as time advances, the temperature varies so greatly in the front of energy that it is difficult to choose an effective initial iterate when the nonlinear algebraic equations are solved by an iterative method. In this paper, a method of choosing a nonlinear initial iterate is proposed for iterative solving this kind of nonlinear algebraic equations. Numerical results show the proposed initial iterate can improve the computational efficiency, and also the convergence behavior of the nonlinear iteration.

An Hengbin [High Performance Computing Center, Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)], E-mail: an_hengbin@iapcm.ac.cn; Mo Zeyao [High Performance Computing Center, Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)], E-mail: zeyao_mo@iapcm.ac.cn; Xu Xiaowen [High Performance Computing Center, Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)], E-mail: xwxu@iapcm.ac.cn; Liu Xu [Graduate School of China Academy of Engineering Physics, Beijing 100088 (China)], E-mail: ninad@sohu.com

2009-05-20T23:59:59.000Z

175

Appendix V Public Involvement Plan  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

V V Public Involvement Plan Revision No.: 6 February 2008 Federal Facility Agreement and Consent Order (FFACO) FFACO, Appendix V February 2008 i FFACO Public Involvement Plan U.S. Department of Energy National Nuclear Security Administration Nevada Site Office Las Vegas, Nevada U.S. Department of Defense Defense Threat Reduction Agency Detachment 1, Nevada Operations Mercury, Nevada U.S. Department of Energy Office of Legacy Management Grand Junction, Colorado FFACO, Appendix V February 2008 ii Preface The Public Involvement Plan serves two purposes: it provides a broad public involvement strategy, and fulfills requirements contained in the Federal Facility Agreement and Consent Order (FFACO) relating to public awareness and participation. Under the FFACO, agreed to by

176

Public Involvment Plan - Rifle, Colorado  

Office of Legacy Management (LM)

4-TAR 4-TAR MAC-GWRIF 7.1 UMTRA Ground Water Project Public Involvement Plan for the Environmental Assessment of Ground Water Compliance at the New and Old Rifle, Colorado, Uranium Mill Tailings Sites May 1999 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work performed under DOE Contract No. DE-AC13-96GJ87335 Public Involvement Plan for the Rifle UMTRA Sites Page 2 Introduction This Public Involvement Plan is tiered to the Uranium Mill Tailings Remedial Action (UMTRA) Ground Water Project Public Participation Plan dated October 1997. This Public Involvement Plan applies to both the Old and New Rifle, Colorado, UMTRA Project sites and details the activities that have been or will be carried out to meet the public participation requirements of the

177

Involving students in peer review  

E-Print Network [OSTI]

Involving students in peer review Case studies and practical strategies for university teaching Jon......................................................................................................................................................2 1. WHAT IS STUDENT PEER REVIEW? A CONCISE REVIEW OF THE LITERATURE....................3 BENEFITS OF PEER REVIEW

Pearce, Jon

178

Analysis of the ITER LFS Reflectometer Transmission Line System  

SciTech Connect (OSTI)

A critical issue in the design of the ITER Low Field Side (LFS) reflectometer is the transmission line (TL) system. A TL connects each launcher to a diagnostic instrument. Each TL will typically consist of ~42 m of corrugated waveguide and up to 10 miter bends. Important issues for the performance of the TL system are mode conversion and reflections. Minimizing mode conversion and reflections in the waveguide are critical to minimizing standing waves and phase errors in the reflectometer-measured phase. The performance of the corrugated waveguide and miter bends is analyzed and recommendations given.

Hanson, Gregory R [ORNL; Wilgen, John B [ORNL; Bigelow, Tim S [ORNL; Diem, Stephanie J [ORNL; Biewer, Theodore M [ORNL

2010-01-01T23:59:59.000Z

179

Solitary Waves of the MRLW Equation by Variational Iteration Method  

SciTech Connect (OSTI)

In a recent publication, Soliman solved numerically the modified regularized long wave (MRLW) equation by using the variational iteration method (VIM). In this paper, corrected numerical results have been computed, plotted, tabulated, and compared with not only the exact analytical solutions but also the Adomian decomposition method results. Solitary wave solutions of the MRLW equation are exactly obtained as a convergent series with easily computable components. Propagation of single solitary wave, interaction of two and three waves, and also birth of solitons have been discussed. Three invariants of motion have been evaluated to determine the conservation properties of the problem.

Hassan, Saleh M. [Department of Mathematics, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451 (Saudi Arabia); Department of Mathematics, College of Science, Ain Shams University, Abbassia 11566, Cairo (Egypt); Alamery, D. G. [Department of Mathematics, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451 (Saudi Arabia)

2009-09-09T23:59:59.000Z

180

Volkov solution for two laser beams and ITER  

E-Print Network [OSTI]

We find the solution of the Dirac equation for two plane waves (laser beams) and we determine the modified Compton formula for the scattering of two photons on an alectron. The practical meaning of the two laser beams is, that two laser beams impinging on a targed which is constituted from material in the form of a foam, can replace 100-200 laser beams impinging on a normal targed. It means that the nuclear fusion with two laser beams is realistic in combination with the nuclear reactor such as ITER.

Miroslav Pardy

2005-07-12T23:59:59.000Z

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181

Flow distribution analysis on the cooling tube network of ITER thermal shield  

SciTech Connect (OSTI)

Thermal shield (TS) is to be installed between the vacuum vessel or the cryostat and the magnets in ITER tokamak to reduce the thermal radiation load to the magnets operating at 4.2K. The TS is cooled by pressurized helium gas at the inlet temperature of 80K. The cooling tube is welded on the TS panel surface and the composed flow network of the TS cooling tubes is complex. The flow rate in each panel should be matched to the thermal design value for effective radiation shielding. This paper presents one dimensional analysis on the flow distribution of cooling tube network for the ITER TS. The hydraulic cooling tube network is modeled by an electrical analogy. Only the cooling tube on the TS surface and its connecting pipe from the manifold are considered in the analysis model. Considering the frictional factor and the local loss in the cooling tube, the hydraulic resistance is expressed as a linear function with respect to mass flow rate. Sub-circuits in the TS are analyzed separately because each circuit is controlled by its own control valve independently. It is found that flow rates in some panels are insufficient compared with the design values. In order to improve the flow distribution, two kinds of design modifications are proposed. The first one is to connect the tubes of the adjacent panels. This will increase the resistance of the tube on the panel where the flow rate is excessive. The other design suggestion is that an orifice is installed at the exit of tube routing where the flow rate is to be reduced. The analysis for the design suggestions shows that the flow mal-distribution is improved significantly.

Nam, Kwanwoo; Chung, Wooho; Noh, Chang Hyun; Kang, Dong Kwon; Kang, Kyoung-O; Ahn, Hee Jae; Lee, Hyeon Gon [ITER Korea, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of)

2014-01-29T23:59:59.000Z

182

E-Print Network 3.0 - asynchronous parallel iterative Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the analysis ofconvergence of asynchronous iterations for parallel solution of linear systems of algebraic... of the asynchronous ... Source: Szyld, Daniel B. - Department of...

183

FILM COOLING CALCULATIONS WITH AN ITERATIVE CONJUGATE HEAT TRANSFER APPROACH USING EMPIRICAL HEAT TRANSFER COEFFICIENT CORRECTIONS.  

E-Print Network [OSTI]

??An iterative conjugate heat transfer technique was developed and automated to predict the temperatures on film cooled surfaces such as flat plates and turbine blades.… (more)

Dhiman, Sushant

2010-01-01T23:59:59.000Z

184

Cryogenic Conduction Cooling Test of Removable Panel Mock-Up for ITER Cryostat Thermal Shield  

Science Journals Connector (OSTI)

ITER / Proceedings of the Twentieth Topical Meeting on the Technology of Fusion Energy (TOFE-2012) (Part 1), Nashville, Tennessee, August 27-31, 2012

K. Nam et al.

185

Iterative development of MobileMums: a physical activity intervention for women with young children  

Science Journals Connector (OSTI)

To describe the iterative development process and final version of ‘MobileMums’: a physical activity intervention for women with young children (mHealth) short ...

Brianna S Fjeldsoe; Yvette D Miller…

2012-12-01T23:59:59.000Z

186

Stochastic Quasi-Fejér Block-Coordinate Fixed Point Iterations with ...  

E-Print Network [OSTI]

tic quasi-Fejér monotonicity, which is thoroughly investigated. The iterative methods under con- sideration feature random sweeping rules to select the blocks of ...

2014-05-28T23:59:59.000Z

187

Optimization Online - On a self-consistent-field-like iteration for ...  

E-Print Network [OSTI]

Apr 19, 2012 ... The SCF iteration is a widely used method for solving the nonlinear eigenvalue problems arising in electronic structure calculations.

Zhang Leihong

2012-04-19T23:59:59.000Z

188

Robust iterative learning control of single-phase grid-connected inverter  

Science Journals Connector (OSTI)

For the single phase inductance-capacitance-inductance (LCL) grid-connected inverter in micro-grid, a kind of robust iterative learning controller...

Zhong-Qiang Wu; Chun-Hua Xu; Yang Yang

2014-08-01T23:59:59.000Z

189

Chevron beam dump for ITER edge Thomson scattering system  

SciTech Connect (OSTI)

This paper contains the design of the beam dump for the ITER edge Thomson scattering system and mainly concerns its lifetime under the harsh thermal and electromagnetic loads as well as tight space allocation. The lifetime was estimated from the multi-pulse laser-induced damage threshold. In order to extend its lifetime, the structure of the beam dump was optimized. A number of bent sheets aligned parallel in the beam dump form a shape called a chevron which enables it to avoid the concentration of the incident laser pulse energy. The chevron beam dump is expected to withstand thermal loads due to nuclear heating, radiation from the plasma, and numerous incident laser pulses throughout the entire ITER project with a reasonable margin for the peak factor of the beam profile. Structural analysis was also carried out in case of electromagnetic loads during a disruption. Moreover, detailed issues for more accurate assessments of the beam dump's lifetime are clarified. Variation of the bi-directional reflection distribution function (BRDF) due to erosion by or contamination of neutral particles derived from the plasma is one of the most critical issues that needs to be resolved. In this paper, the BRDF was assumed, and the total amount of stray light and the absorbed laser energy profile on the beam dump were evaluated.

Yatsuka, E.; Hatae, T.; Bassan, M.; Itami, K. [Japan Atomic Energy Agency, 801-1 Mukoyama, Naka, Ibaraki 311-0193 (Japan)] [Japan Atomic Energy Agency, 801-1 Mukoyama, Naka, Ibaraki 311-0193 (Japan); Vayakis, G. [ITER Organization, 13115 St Paul Lez Durance Cedex (France)] [ITER Organization, 13115 St Paul Lez Durance Cedex (France)

2013-10-15T23:59:59.000Z

190

MHD stability of the pedestal in ITER scenarios  

Science Journals Connector (OSTI)

The linear ideal magnetohydrodynamic (MHD) limits of the pedestal in ITER scenarios associated with the preparation and realization of the nominal fusion gain Q = 10 (inductive scenario at 15 MA/5.3 T, half-field/half-current and intermediate H-mode scenario at 10 MA/3.5 T), as well as the hybrid scenario at 12 MA/5.3 T, are investigated in this work. The accessible part of the MHD stability diagram is determined by computing the bootstrap current and self-consistently evaluating the corresponding pedestal current. This procedure shows that only a small part of peeling–ballooning diagrams is physically accessible. Uncertainties about the foreseen plasma profiles motivate studies evaluating the impact of various parameters on the pedestal limits. We have addressed issues such as the pedestal width, the global performance, pressure peaking, edge current density, internal inductance and plasma shaping. A scaling law for the maximum pedestal pressure in the ITER scenarios is proposed, highlighting that the main dependences are on the plasma current, the edge safety factor, the pedestal width and the internal inductance.

P. Maget; J.-F. Artaud; M. Bécoulet; T. Casper; J. Faustin; J. Garcia; G.T.A. Huijsmans; A. Loarte; G. Saibene

2013-01-01T23:59:59.000Z

191

Solid breeder blanket option for the ITER conceptual design  

SciTech Connect (OSTI)

A solid-breeder water-cooled blanket option was developed for ITER based on a multilayer configuration. The blanket uses beryllium for neutron multiplication and lithium oxide for tritium breeding. The material forms are sintered products for both material with 0.8 density factor. The lithium-6 enrichment is 90%. This blanket has the capability to accommodate a factor of two change in the neutron wall loading without violating the different design guidelines. The design philosophy adopted for the blanket is to produce the necessary tritium required for the ITER operation and to operate at power reactor conditions as much as possible. At the same time, the reliability and the safety aspects of the blanket are enhanced by the use of a low-pressure coolant and the separation of the tritium purge lines from the coolant system. The blanket modules are made by hot vacuum forming and diffusion bonding a double wall structure with integral cooling channels. The different aspects of the blanket design including tritium breeding, nuclear heat deposition, activation analyses, thermal-hydraulics, tritium inventory, structural analyses, and water coolant conditions are summarized in this paper. 12 refs., 2 figs., 1 tab.

Gohar, Y.; Attaya, H.; Billone, M.C.; Finn, P.; Majumdar, S.; Turner, L.R.; Baker, C.C.; Nelson, B.E.; Raffray, R. (Argonne National Lab., IL (USA); Oak Ridge National Lab., TN (USA); California Univ., Los Angeles, CA (USA))

1989-10-01T23:59:59.000Z

192

Community Involvement Fund | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Community Involvement Community Involvement Fund Community Involvement Fund Community Involvement Fund Community Involvement Fund Community Involvement Fund Community Involvement Fund Community Involvement Fund Community Involvement Fund Community Involvement Fund Community Involvement Fund Overview The success of EM's legacy waste cleanup mission depends largely on the support of informed and engaged stakeholders. Cleanup activities have the potential to affect the health of the public, the environment, and the future of the communities that either host or are located near EM sites. Therefore, it is critical that EM receive public input from local citizens and community organizations prior to making cleanup decisions. In December 2010, EM partnered with the New Mexico Community Foundation

193

NUCLEAR MODULES OF ITER TOKAMAK SYSTEMS CODE* ain CONF-871007--68  

E-Print Network [OSTI]

NUCLEAR MODULES OF ITER TOKAMAK SYSTEMS CODE* ain CONF-871007--68 DE88 002884 Y. Gohar, C. Baker, J. Brooks, P. Finn, A. Hassanein, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, IL 60439; S Energy under Contract W-31-109 Eng-38. * · * * · · OF Tli!S CGCL'wEliT ISUNUCLEAR MODULES OF ITER

Harilal, S. S.

194

Soft-Input, Iterative, Reed-Solomon Decoding using Redundant Parity-Check Equations  

E-Print Network [OSTI]

approach to the iterative decoding of Reed-Solomon (RS) codes. The pre- sented methodology utilizesSoft-Input, Iterative, Reed-Solomon Decoding using Redundant Parity-Check Equations Jason Bellorado techniques is achievable with the presented methodology. The complexity of the proposed algorithm is orders

Kavcic, Aleksandar

195

Proposal of an Arc Detection Technique Based on RF Measurements for the ITER ICRF Antenna  

SciTech Connect (OSTI)

RF arc detection is a key operational and safety issue for the ICRF system on ITER. Indeed the high voltages inside the antenna put it at risk of arcing, which could cause substantial damage. This paper describes the various possibilities explored by circuit simulation and the strategy now considered to protect the ITER ICRF antenna from RF arcs.

Huygen, S.; Dumortier, P.; Durodie, F.; Messiaen, A.; Vervier, M.; Vrancken, M. [LPP/ERM-KMS, Association EURATOM-Belgian State, Brussels (Belgium); Wooldridge, E. [EURATOM/CCFE Fusion Association, Culham Science Centre (United Kingdom)

2011-12-23T23:59:59.000Z

196

SYMMETRIC ITERATED BETTI NUMBERS ERIC BABSON, ISABELLA NOVIK, AND REKHA THOMAS  

E-Print Network [OSTI]

SYMMETRIC ITERATED BETTI NUMBERS ERIC BABSON, ISABELLA NOVIK, AND REKHA THOMAS Abstract. We de#12 Betti numbers of I. We prove that for I , the Stanley-Reisner ideal of a simplicial complex , these numbers are the symmetric counterparts of the exterior iterated Betti numbers of introduced by Duval

Novik, Isabella

197

Looking on bright side of losing ITER Risa Kato and Tetsuro Yamada / Yomiuri Shimbun Staff Writers  

E-Print Network [OSTI]

to have a remote-controlled ITER experiment unit, and one for the development of super heat candidate to have a remote-control facility is of especially high significance, according to experts. The remote-control facility is envisaged as playing a key role in the ITER project, as it will be able

198

A three-dimensional adaptive method based on the iterative grid redistribution  

E-Print Network [OSTI]

such as fluid dynamics, combustion and heat transfer and others, the required density of grid pointsA three-dimensional adaptive method based on the iterative grid redistribution Desheng Wang on iterative grid redistribution technique introduced in [J. Comput. Phys. 159 (2000) 246]. The key step

Wang, Desheng

199

NESTED ITERATION AND FIRST-ORDER SYSTEM LEAST SQUARES FOR INCOMPRESSIBLE, RESISTIVE MAGNETOHYDRODYNAMICS  

E-Print Network [OSTI]

NESTED ITERATION AND FIRST-ORDER SYSTEM LEAST SQUARES FOR INCOMPRESSIBLE, RESISTIVE. This paper develops a nested iteration algorithm to solve time-dependent nonlinear systems of partial a sequence of nested spaces, where the resolution of the approximations increases as the algorithm progresses

McCormick, Steve

200

STUDENT EMPLOYMENT Student Involvement Outcomes  

E-Print Network [OSTI]

STUDENT EMPLOYMENT Student Involvement Outcomes reflective assessment High impact practices ASSOCIATED STUDENTS, CSUF, INC. Committed TO ON-CAMPUS ENGAGEMENT · SUPPORTING STUDENT SUCCESS · UNIFYING THE STUDENT VOICE · FOSTERING TITAN PRIDE #12;Organizational Structure Associated Students, CSUF, Inc. (ASI

de Lijser, Peter

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Visions for Data Management and Remote Collaboration on ITER  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Transport And Density Peaking At Low Transport And Density Peaking At Low Collisionality On Alcator C-Mod 49 th Annual Meeting of APS - DPP Orlando, 11/14/2007 M. Greenwald, J.W. Hughes, D. Mikkelsen, J. Terry, Alcator Group C. Angioni, H. Weisen M. Greenwald, et al., APS-DPP November 2007 Particle Transport and Density Profiles ● We want to be able to predict density profile - Better fusion performance with moderate density peaking - Effects on stability, divertor operation etc. ● Results from ASDEX (Angioni et al., PRL 2003), JET (H. Weisen, et al., NF 2005) show increase in density peaking at low ν* for H-mode plasmas. - Central fueling (NBI) can play an important role as well. ● Scales to ITER (with weak fueling): n e (0)/ ~ 1.4-1.5 ● In this talk, we'll also look at an additional effect: the role of safety factor

202

Thermoeconomic analysis of a CHP system by iterative numerical techniques  

SciTech Connect (OSTI)

This paper deals with the determination of the thermoeconomic optimum conditions for a constant space heat load imposed on the air coil of a combined heating and power (CHP) system using iterative numerical techniques. From the thermodynamic relations and equations derived from the energy balance and heat exchanger characteristics, an objective function and constraining equations are obtained. A computer program is developed based on the Redlich-Kwong equation of state to estimate the thermodynamic properties of the refrigerant fluid R-22. Additional computer subroutines are developed to perform thermodynamic and thermoeconomic optimization. Optimum values of the operating variables are identified at thermodynamic and thermoeconomic optimum conditions. Results show that the total irreversibilities produced in the system and the cost of fuel consumption are minimum at thermodynamic optimum conditions, but the annual cost of owning and operating the system is minimum at the thermoeconomic optimum condition, which is 34% lower than at the thermodynamic optimum condition.

Damshala, P.R.

2000-07-01T23:59:59.000Z

203

Ideal MHD Stability of ITER Steady State Scenarios with ITBs  

SciTech Connect (OSTI)

One of ITER goals is to demonstrate feasibility of continuous operations using non-inductive current drive. Two main candidates have been identified for advanced operations: the long duration, high neutron fluency hybrid scenario and the steady state scenario, both operating at a plasma current lower than the reference ELMy scenario [1][2] to minimize the required current drive. The steady state scenario targets plasmas with current 7-10 MA in the flat-top, 50% of which will be provided by the self-generated, pressure-driven bootstrap current. It has been estimated that, in order to obtain a fusion gain Q > 5 at a current of 9 MA, it should be ?N > 2.5 and H > 1.5 [3]. This implies the presence of an Internal Transport Barrier (ITB). This work discusses how the stability of steady state scenarios with ITBs is affected by the external heating sources and by perturbations of the equilibrium profiles.

F.M. Poli, C.E. Kessel, S. Jardin, J. Manickam, M. Chance, J. Chen

2011-07-27T23:59:59.000Z

204

Iterative methods for dose reduction and image enhancement in tomography  

DOE Patents [OSTI]

A system and method for creating a three dimensional cross sectional image of an object by the reconstruction of its projections that have been iteratively refined through modification in object space and Fourier space is disclosed. The invention provides systems and methods for use with any tomographic imaging system that reconstructs an object from its projections. In one embodiment, the invention presents a method to eliminate interpolations present in conventional tomography. The method has been experimentally shown to provide higher resolution and improved image quality parameters over existing approaches. A primary benefit of the method is radiation dose reduction since the invention can produce an image of a desired quality with a fewer number projections than seen with conventional methods.

Miao, Jianwei; Fahimian, Benjamin Pooya

2012-09-18T23:59:59.000Z

205

Development of the bus joint for the ITER Central Solenoid  

SciTech Connect (OSTI)

The terminations of the Central Solenoid (CS) modules are connected to the bus extensions by joints located outside the CS in the gap between the CS and Torodial Field (TF) assemblies. These joints have very strict space limitations. Low resistance is a common requirement for all ITER joints. In addition, the CS bus joints will experience and must be designed to withstand significant variation in the magnetic field of several tenths of a Tesla per second during initiation of plasma. The joint resistance is specified to be less than 4 nOhm. The joints also have to be soldered in the field and designed with the possibility to be installed and dismantled in order to allow cold testing in the cold test facility. We have developed coaxial joints that meet these requirements and have demonstrated the feasibility to fabricate and assemble them in the vertical configuration. We introduced a coupling cylinder with superconducting strands soldered to the surface of the cable that can be installed in the ITER assembly hall and at the Cold Test Facility. This cylinder serves as a transition area between the CS module and the bus extension. We made two racetrack samples and tested four bus joints in our Joint Test Apparatus. Resistance of the bus joints was measured by a decay method and by a microvoltmeter; the value of the current was measured by the Hall probes. This measurement method was verified in the previous tests. The resistance of the joints varied insignificantly from 1.5 to 2 nOhm. One of the challenges associated with a soldered joint is the inability to use corrosive chemicals that are difficult to clean. This paper describes our development work on cable preparation, chrome removal, compaction, soldering, and final assembly and presents the test results.

Martovetsky, Nicolai N [ORNL] [ORNL; Irick, David Kim [ORNL] [ORNL; Kenney, Steven J [ORNL] [ORNL

2013-01-01T23:59:59.000Z

206

Rate Adjustments and Public Involvement  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Rate Adjustments and Public Involvement Documents Rate Adjustments and Public Involvement Documents CRSP Transmission 9/16/2013 WAPA-161 FRN, CRSP transmission and ancillary services rates extension Letter announcing two-year extension to CRSP transmission and ancillary services rates Letter announcing revised CRSP transmission rates for FY 2014 Accompanying calculation table for FY 2014 CRSP transmission rate letter Letter announcing revised CRSP transmission rates for FY 2013 Letter announcing revised CRSP transmission rates for FY 2012 Letter announcing revised CRSP transmission rates for FY 2011 Letter announcing revised CRSP transmission rates for FY 2010 SLCA/IP 9/16/2013 WAPA-161 FRN, SLCA/IP firm power rate extension Letter announcing two-year extension to SLCA/IP firm power rate SLCA/IP Tentative Rate Adjustment Schedule

207

Political Involvement and Electoral Competition  

E-Print Network [OSTI]

Annual Review of Political Science, 7, pp. 25-46. Kendall,Conway, M. Margaret. 2000. Political participation in theand O. Listhaug. 1995. Political Sophistication and Models

De Sio, Lorenzo

2006-01-01T23:59:59.000Z

208

Involvement, attributions, and consumer responses to rebates  

Science Journals Connector (OSTI)

This paper examines effects of both purchasing involvement and product involvement on consumers' responses to rebates. In Part One, the study examines ... effects of involvement on consumer responses to a rebate ...

Kenneth A. Hunt; Susan M. Keaveney; Moonkyu Lee

1995-01-01T23:59:59.000Z

209

An iterative searching and ranking algorithm for prioritising pharmacogenomics genes  

Science Journals Connector (OSTI)

Pharmacogenomics (PGx) studies are to identify genetic variants that may affect drug efficacy and toxicity. A machine understandable drug-gene relationship knowledge is important for many computational PGx studies and for personalised medicine. A comprehensive and accurate PGx-specific gene lexicon is important for automatic drug-gene relationship extraction from the scientific literature, rich knowledge source for PGx studies. In this study, we present a bootstrapping learning technique to rank 33,310 human genes with respect to their relevance to drug response. The algorithm uses only one seed PGx gene to iteratively extract and rank co-occurred genes using 20 million MEDLINE abstracts. Our ranking method is able to accurately rank PGx-specific genes highly among all human genes. Compared to randomly ranked genes (precision: 0.032, recall: 0.013, F1: 0.018), the algorithm has achieved significantly better performance (precision: 0.861, recall: 0.548, F1: 0.662) in ranking the top 2.5% of genes.

Rong Xu; QuanQiu Wang

2013-01-01T23:59:59.000Z

210

Status of the Design of the ITER ECE Diagnostic  

SciTech Connect (OSTI)

The baseline design for the ITER electron cyclotron emission (ECE) diagnostic has entered the detailed preliminary design phase. Two plasma views are planned, a radial view and an oblique view that is sensitive to distortions in the electron momentum distribution near the average thermal momentum. Both views provide high spatial resolution electron temperature profiles when the momentum distribution remains Maxwellian. The ECE diagnostic system consists of the front-end optics, including two 1000 K calibration sources, in equatorial port plug EP9, the 70-1000 GHz transmission system from the front-end to the diagnostics hall, and the ECE instrumentation in the diagnostics hall. The baseline ECE instrumentation will include two Michelson interferometers that can simultaneously measure ordinary and extraordinary mode ECE from 70 to 1000 GHz, and two heterodyne radiometer systems, covering 122-230 GHz and 244-355 GHz. Significant design challenges include 1) developing highly-reliable 1000 K calibration sources and the associated shutters/mirrors, 2) providing compliant couplings between the front-end optics and the polarization splitter box that accommodate displacements of the vacuum vessel during plasma operations and bake out, 3) protecting components from damage due to stray ECH radiation and other intense millimeter wave emission and 4) providing the low-loss broadband transmission system.

Taylor, Gary [PPPL

2014-04-01T23:59:59.000Z

211

Thirty states sign ITER nuclear fusion plant deal 1 hour, 28 minutes ago  

E-Print Network [OSTI]

Thirty states sign ITER nuclear fusion plant deal 1 hour, 28 minutes ago Representatives of more than 30 countries signed a deal on Tuesday to build the world's most advanced nuclear fusion reactor

212

Efficient Approximate Value Iteration for Continuous Gaussian POMDPs Jur van den Berg1  

E-Print Network [OSTI]

Efficient Approximate Value Iteration for Continuous Gaussian POMDPs Jur van den Berg1 Sachin Patil2 Ron Alterovitz2 1 School of Computing, University of Utah, berg@cs.utah.edu. 2 Dept. of Computer

van den Berg, Jur

213

PPPL and ITER: Lab teams support the world's largest fusion experiment...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

PPPL and ITER: Lab teams support the world's largest fusion experiment with leading-edge ideas and design By John Greenwald May 7, 2013 Tweet Widget Google Plus One Share on...

214

Full tokamak discharge simulation and kinetic plasma profile control for ITER.  

E-Print Network [OSTI]

??Understanding non-linearly coupled physics between plasma transport and free-boundary equilibrium evolution is essential to operating future tokamak devices, such as ITER and DEMO, in the… (more)

Kim, Sun Hee

2009-01-01T23:59:59.000Z

215

Decomposition of one-dimensional waveform using iterative Gaussian diffusive filtering methods  

Science Journals Connector (OSTI)

...conventional Gaussian smoothing method (Mackworth...method, the Gaussian exponential function has the following...selection of an appropriate smoothing factor, sigma, as...ends attenuates in an exponential manner as points move...iterative Gaussian smoothing method. The above...

2008-01-01T23:59:59.000Z

216

A Technique for Generic Iteration and Its Optimization Stephen M. Watt  

E-Print Network [OSTI]

A Technique for Generic Iteration and Its Optimization Stephen M. Watt Department of Computer Science University of Western Ontario London Ontario, Canada N6A 5B7 watt@csd.uwo.ca Abstract Software

Watt, Stephen M.

217

Prediction-based Iterative Learning Control (PILC) for Uncertain Dynamic Nonlinear Systems Using System Identification Technique  

Science Journals Connector (OSTI)

Prediction-based Iterative Learning Control (PILC) is proposed in this paper for a ... time varying nonlinear uncertain systems. Convergence of PILC is analyzed and the uniform boundedness of ... succeeding itera...

M. Arif; T. Ishihara; H. Inooka

2000-03-01T23:59:59.000Z

218

Simulation-based scheduling for parcel consolidation terminals: a comparison of iterative improvement and simulated annealing  

Science Journals Connector (OSTI)

This research explores the application of a simulation-based scheduling algorithm to generate unload schedules for processing feeder trailers in a parcel consolidation terminal. The study compares the performance of iterative improvement and simulated ...

Douglas L. McWilliams

2005-12-01T23:59:59.000Z

219

Symbol Synchronization in Coded UWB Systems using Adaptive Iterative Detection Durai Thirupathi and Keith M. Chugg  

E-Print Network [OSTI]

common UWB system found in the literature, the impulse radio, uses very narrow pulses as a way to expand significantly degrading the perfor- mance. I. INTRODUCTION After the discovery of turbo codes [1], iterative

Southern California, University of

220

Convergent Iterative Constrained Variation Algorithm for Calculation of Electron-Transfer Transition States  

E-Print Network [OSTI]

Convergent Iterative Constrained Variation Algorithm for Calculation of Electron the potential-dependent transition states of electron transfer reactions by quantum calculations. This approach makes it more feasible to study heterogeneous electron transfer processes with the theory of local

Pitsch, Heinz

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221

RF Analysis of ITER Remote Steering Antenna for Electron-Cyclotron Plasma Heating  

Science Journals Connector (OSTI)

An application of remote RF beam steering concept, based on image multiplication phenomena in a corrugated square waveguide, to electron-cyclotron plasma heating and current drive for ITER has been ... breakdown,...

G.G. Denisov; S.V. Kuzikov; N. Kobayashi

2001-12-01T23:59:59.000Z

222

PISCES FY11 Research Highlight Tritium accumulation within the ITER vessel is expected to be dominated  

E-Print Network [OSTI]

. The PISCES-B device at the University of California in San Diego has used a high power laser system disruption avoidance by intentional mitigation of high-power ITER discharges, it does not appear to be a risk

223

Panel Report to FESAC: Review of the 1996 ITER Detailed Design Report  

Science Journals Connector (OSTI)

This report presents the results of a U.S. review of the 1996 Detailed Design Report (DDR) of the International Thermonuclear Experimental Reactor (ITER) project. It was prepared by a panel established by the ...

R. W. Conn; D. E. Baldwin; R. J. Briggs; J. D. Callen…

1999-12-01T23:59:59.000Z

224

The European Joint Undertaking for ITER and the Development of Fusion Energy  

E-Print Network [OSTI]

· Manage procurement and Quality Assurance · Arrange to make European staff available to ITER · Interface · Transparency ­ decision making process and Financial Regulation rules · Synergy and Complementarity

225

Vacuum photodiode detectors for soft x-ray ITER plasma tomography  

SciTech Connect (OSTI)

A special type of vacuum photodiode detector (VPD) for x-ray tomography of (ITER) plasma is described. Laboratory experiments demonstrate that VPD has high sensitivity to thermal x-rays and low sensitivity to hard gamma rays and neutrons. It was shown that in ITER environment the signal due to thermal x-rays will surpass the background signal by more than a factor of 100.

Gott, Yu.V.; Stepanenko, M.M. [RRC, Nuclear Fusion Institute, Kurchatov sq.1, Moscow, 123182 (Russian Federation)

2005-07-15T23:59:59.000Z

226

Iterative cellular array multiplier using overlapped four-bit scanning technique and its application  

E-Print Network [OSTI]

ITERATIVE CELLULAR ARRAY MULTIPLIER USING OVERLAPPED FOUR-BIT SCANNING TECHNIQUE AND ITS APPLICATION A Thesis WU WOAN KIM Submitted to the 0%ce of Graduate Studies of Texas ARM University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE December 1990 Major Subject: Electrical Engineering ITERATIVE CELLULAR ARRAY MULTIPLIER USING OVERLAPPED FOUR-BIT SCANNING TECHNIQUE AND ITS APPLICATION A Thesis WU WOAN KIM Approved as to style and content by: Karan...

Kim, Wu Woan

2012-06-07T23:59:59.000Z

227

Implementation of an iterative technique for a solution of the Thomas-Fermi equation  

E-Print Network [OSTI]

IMPLEMENTATION OF AN ITERATIVE TECHNIQUE FOR A SOLUTION OF THE THOMAS-FERMI EQUATION A Thesis by RAYMOND CALVERT FLAGG Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree... of MASTER OF SCIENCE August 1978 Major Subject: Mathematics IMPLEMENTATION OF AN ITERATIVE TECHNIQUE FOR A SOLUTION OF THE THOMAS-FERMI EQUATION A Thesis by RAYMOND CALVERT FLAGG Approved as to sryle and content by: (Chairman of Committeeee ( ead...

Flagg, Raymond Calvert

2012-06-07T23:59:59.000Z

228

Toroidal field coil replacement study for the International Thermonuclear Experimental Reactor (ITER)  

SciTech Connect (OSTI)

The objective of this study is to develop an estimate of the time required to replace a failed toroidal field (TF) coil in the International Thermonuclear Experimental Reactor (ITER). This estimate is based on the current ITER design which resulted from the Conceptual Design Activities began in spring of 1988 and ending in December 1990. Although the TF Coils in ITER are designated permanent components and expected to last the life of the plant, the history of failures of large coils in fusion devices has prompted an assessment of the down time that might be required for replacement of a failed TF coil in ITER. The difficulty of replacement of a TF Coil in ITER is compounded by the large physical size of ITER, and the radiation fields which necessitate the use of remote handling equipment for most maintenance activities. Since 10 out of 16 TF coils are adjacent to either a Neutral Beam Injector (NBI) port or a remote handling (RH) port, it is probable that a failed TF Coil will be in one of these inconvenient locations. For this study, TF coil number 3 is assumed to fail and its replacement will be evaluated as a typical case. TF coil number 3 is located between a remote handling port ({number sign}3) and a port allocated to the lower hybrid ({number sign}4).

Not Available

1991-08-01T23:59:59.000Z

229

Toroidal field coil replacement study for the International Thermonuclear Experimental Reactor (ITER)  

SciTech Connect (OSTI)

The objective of this study is to develop an estimate of the time required to replace a failed toroidal field (TF) coil in the International Thermonuclear Experimental Reactor (ITER). This estimate is based on the current ITER design which resulted from the Conceptual Design Activities began in spring of 1988 and ending in December 1990. Although the TF Coils in ITER are designated permanent components and expected to last the life of the plant, the history of failures of large coils in fusion devices has prompted an assessment of the down time that might be required for replacement of a failed TF coil in ITER. The difficulty of replacement of a TF Coil in ITER is compounded by the large physical size of ITER, and the radiation fields which necessitate the use of remote handling equipment for most maintenance activities. Since 10 out of 16 TF coils are adjacent to either a Neutral Beam Injector (NBI) port or a remote handling (RH) port, it is probable that a failed TF Coil will be in one of these inconvenient locations. For this study, TF coil number 3 is assumed to fail and its replacement will be evaluated as a typical case. TF coil number 3 is located between a remote handling port ({number_sign}3) and a port allocated to the lower hybrid ({number_sign}4).

Not Available

1991-08-01T23:59:59.000Z

230

Fusion Technology for ITER, the ITER Project. Further Development Towards a DEMO Fusion Power Plant (3/4)  

E-Print Network [OSTI]

This is the second half of a lecture series on fusion and will concentrate on fusion technology. The early phase of fusion development was concentrated on physics. However, during the 1980s it was realized that if one wanted to enter the area of fusion reactor plasmas, even in an experimental machine, a significant advance in fusion technologies would be needed. After several conceptual studies of reactor class fusion devices in the 1980s the engineering design phase of ITER started in earnest during the 1990s. The design team was in the beginning confronted with many challenges in the fusion technology area as well as in physics for which no readily available solution existed and in a few cases it was thought that solutions may be impossible to find. However, after the initial 3 years of intensive design and R&D work in an international framework utilizing basic fusion technology R&D from the previous decade it became clear that for all problems a conceptual solution could be found and further devel...

CERN. Geneva

2011-01-01T23:59:59.000Z

231

An iterative longest matching segment approach to speech enhancement with additive noise and channel distortion  

Science Journals Connector (OSTI)

This paper presents a new approach to speech enhancement from single-channel measurements involving both noise and channel distortion (i.e., convolutional noise), and demonstrates its applications for robust speech recognition and for improving noisy ... Keywords: Channel distortion, Corpus-based speech modeling, Longest matching segment, Noisy speech, Speech enhancement, Speech recognition

Ji Ming, Danny Crookes

2014-11-01T23:59:59.000Z

232

FEMCAM Analysis of SULTAN Test Results for ITER Nb3SN Cable-conduit Conductors  

SciTech Connect (OSTI)

Performance degradation due to filament fracture of Nb3 Sn cable-in-conduit conductors (CICCs) is a critical issue in large-scale magnet designs such as ITER which is currently being constructed in the South of France. The critical current observed in most SULTAN TF CICC samples is significantly lower than expected and the voltage-current characteristic is seen to have a much broader transition from a single strand to the CICC. Moreover, most conductors exhibit the irreversible degradation due to filament fracture and strain relaxation under electromagnetic cyclic loading. With recent success in monitoring thermal strain distribution and its evolution under the electromagnetic cyclic loading from in situ measurement of critical temperature, we apply FEMCAM which includes strand filament breakage and local current sharing effects to SULTAN tested CICCs to study Nb3 Sn strain sensitivity and irreversible performance degradation. FEMCAM combines the thermal bending effect during cool down and the EM bending effect due to locally accumulating Lorentz force during magnet operation. It also includes strand filament fracture and related local current sharing for the calculation of cable n value. In this paper, we model continuous performance degradation under EM cyclic loading based on strain relaxation and the transition broadening upon cyclic loading to the extreme cases seen in SULTAN test data to better quantify conductor performance degradation.

Yuhu Zhai, Pierluigi Bruzzone, Ciro Calzolaio

2013-03-19T23:59:59.000Z

233

An Iterative Algorithm for Battery-Aware Task Scheduling on Portable Computing Platforms  

E-Print Network [OSTI]

In this work we consider battery powered portable systems which either have Field Programmable Gate Arrays (FPGA) or voltage and frequency scalable processors as their main processing element. An application is modeled in the form of a precedence task graph at a coarse level of granularity. We assume that for each task in the task graph several unique design-points are available which correspond to different hardware implementations for FPGAs and different voltage-frequency combinations for processors. It is assumed that performance and total power consumption estimates for each design-point are available for any given portable platfrom, including the peripheral components such as memory and display power usage. We present an iterative heuristic algorithm which finds a sequence of tasks along with an appropriate design-point for each task, such that a deadline is met and the amount of battery energy used is as small as possible. A detailed illustrative example along with a case study of a real-world applicati...

Khan, Jawad

2011-01-01T23:59:59.000Z

234

Hybrid Diverter Sheath Model Jeff Hammel  

E-Print Network [OSTI]

Hybrid Diverter Sheath Model Jeff Hammel Plasma Theory and Simulation Group APS ­ Division using a particle-fluid hybrid model. Electrons are modeled as an inertia-less (Boltzmann) fluid gyrokinetic code. The modeling methodology for the iterative nonlinear solver is presented. The hybrid model

Wurtele, Jonathan

235

11/12/07 11:45Project Syndicate Page 1 sur 3file:///Users/balibar/Desktop/Sebastien/climat+nergie+ITER/ITER/Project%20Syndicate.webarchive  

E-Print Network [OSTI]

, because nuclear fusion can provide an infinite and clean source of energy. But ITER will do nothing, Alternative Green Energy Growth Stock. www.GulfEthanolCorp.com Home / Commentaries / The Fusion Myth Article and form heavier elements (helium). Both fission and fusion produce a lot of energy. Some political leaders

Balibar, SĂ©bastien

236

Fusion Reactions Involving Radioactive Beams at GANIL  

Science Journals Connector (OSTI)

......February 2004 research-article Articles Fusion Reactions Involving Radioactive Beams...been used to produce exotic nuclei via fusion evaporation or to study reaction mechanisms...Physics Supplement No. 154, 2004 113 Fusion Reactions Involving Radioactive Beams......

Gilles de France

2004-02-01T23:59:59.000Z

237

Design and Analysis of the ITER Vertical Stability Coils  

SciTech Connect (OSTI)

The ITER vertical stability (VS) coils have been developed through the preliminary design phase by Princeton Plasma Physics Laboratory (PPPL). Final design, prototyping and construction will be carried out by the Chinese Participant Team contributing lab, Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP). The VS coils are a part of the in-vessel coil systems which include edge localized mode (ELM) coils as well as the VS coils. An overview of the ELM coils is provided in another paper at this conference. 15 The VS design employs four turns of stainless steel jacketed mineral insulated copper (SSMIC) conductors The mineral insulation is Magnesium Oxide (MgO). Joule and nuclear heat is removed by water flowing at 3 m/s through the hollow copper conductor. A key element in the design is that slightly elevated temperatures in the conductor and its support spine during operation impose compressive stresses that mitigate fatigue damage. Away from joints, and break-outs, conductor thermal stresses are low because of the axisymmetry of the winding (there are no corner bends as in the ELM coils).The 120 degree segment joint, and break-out or terminal regions are designed with similar but imperfect constraint compared with the ring coil portion of the VS. The support for the break-out region is made from a high strength copper alloy, CuCrZr. This is needed to conduct nuclear heat to the actively cooled conductor and to the vessel wall. The support "spine" for the ring coil portion of the VS is 316 stainless steel, held to the vessel with preloaded 718 bolts. Lorentz loads resulting from normal operating loads, disruption loads and loads from disruption currents in the support spine shared with vessel, are applied to the VS coil. The transmission of the Lorentz and thermal expansion loads from the "spine" to the vessel rails is via friction augmented with a restraining "lip" to ensure the coil frictional slip is minimal and acceptable. Stresses in the coil, joints, and break-outs are presented. These are compared with static and fatigue allowables. Design for fatigue is much less demanding than for the ELM coils. A total of 30,000 cycles is required for VS design. Loads on the vessel due to the thermal expansion of the coil and spine are significant. Efforts to reduce these by reducing the cross section of the spine have been made but the vessel still must support loads resulting from restraint of thermal expansion.

Peter H. Titus, et. al.

2012-09-06T23:59:59.000Z

238

Public Involvement and Communications Committee Summaries - Hanford...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Hanford Advisory Board > Committee Meeting Information > Involvement and Communications Hanford Advisory Board Convening Report SSAB Guidance Membership Nomination and Appointment...

239

Pellet injection into H-mode ITER plasma with the presence of internal transport barriers  

SciTech Connect (OSTI)

The impacts of pellet injection into ITER type-1 ELMy H-mode plasma with the presence of internal transport barriers (ITBs) are investigated using self-consistent core-edge simulations of 1.5D BALDUR integrated predictive modeling code. In these simulations, the plasma core transport is predicted using a combination of a semi-empirical Mixed B/gB anomalous transport model, which can self-consistently predict the formation of ITBs, and the NCLASS neoclassical model. For simplicity, it is assumed that toroidal velocity for {omega}{sub E Multiplication-Sign B} calculation is proportional to local ion temperature. In addition, the boundary conditions are predicted using the pedestal temperature model based on magnetic and flow shear stabilization width scaling; while the density of each plasma species, including both hydrogenic and impurity species, at the boundary are assumed to be a large fraction of its line averaged density. For the pellet's behaviors in the hot plasma, the Neutral Gas Shielding (NGS) model by Milora-Foster is used. It was found that the injection of pellet could result in further improvement of fusion performance from that of the formation of ITB. However, the impact of pellet injection is quite complicated. It is also found that the pellets cannot penetrate into a deep core of the plasma. The injection of the pellet results in a formation of density peak in the region close to the plasma edge. The injection of pellet can result in an improved nuclear fusion performance depending on the properties of pellet (i.e., increase up to 5% with a speed of 1 km/s and radius of 2 mm). A sensitivity analysis is carried out to determine the impact of pellet parameters, which are: the pellet radius, the pellet velocity, and the frequency of injection. The increase in the pellet radius and frequency were found to greatly improve the performance and effectiveness of fuelling. However, changing the velocity is observed to exert small impact.

Leekhaphan, P. [Thammasat University, School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology (Thailand); Onjun, T. [Thammasat University, School of Manufacturing Systems and Mechanical Engineering, Sirindhorn International Institute of Technology (Thailand)

2011-04-15T23:59:59.000Z

240

"Progress in U.S. ITER Magnet Systems", Wayne Reiersen, Princeton  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

November 28, 2012, 4:15pm November 28, 2012, 4:15pm MBG Auditorium "Progress in U.S. ITER Magnet Systems", Wayne Reiersen, Princeton University Mr. Wayne Reiersen Princeton University U.S. ITER is responsible for providing the ITER Central Solenoid (CS), nine lengths of Toroidal Field (TF) Coil conductor, and Insert Coils for assessing CS and TF conductor performance. The status of the ongoing design and fabrication efforts will be reviewed. The interesting hurdles that had to be negotiated, the lingering problems, and the lessons learned will be discussed. (At the presenter's request, no video or presentation materials are available for this lecture.) Contact Information Coordinator(s): Carol Ann Austin caustin@pppl.gov Host(s): Phil Heitzenroeder pheitzen@pppl.gov PPPL Entrance Procedures

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241

Cyber Incidents Involving Control Systems  

SciTech Connect (OSTI)

The Analysis Function of the US-CERT Control Systems Security Center (CSSC) at the Idaho National Laboratory (INL) has prepared this report to document cyber security incidents for use by the CSSC. The description and analysis of incidents reported herein support three CSSC tasks: establishing a business case; increasing security awareness and private and corporate participation related to enhanced cyber security of control systems; and providing informational material to support model development and prioritize activities for CSSC. The stated mission of CSSC is to reduce vulnerability of critical infrastructure to cyber attack on control systems. As stated in the Incident Management Tool Requirements (August 2005) ''Vulnerability reduction is promoted by risk analysis that tracks actual risk, emphasizes high risk, determines risk reduction as a function of countermeasures, tracks increase of risk due to external influence, and measures success of the vulnerability reduction program''. Process control and Supervisory Control and Data Acquisition (SCADA) systems, with their reliance on proprietary networks and hardware, have long been considered immune to the network attacks that have wreaked so much havoc on corporate information systems. New research indicates this confidence is misplaced--the move to open standards such as Ethernet, Transmission Control Protocol/Internet Protocol, and Web technologies is allowing hackers to take advantage of the control industry's unawareness. Much of the available information about cyber incidents represents a characterization as opposed to an analysis of events. The lack of good analyses reflects an overall weakness in reporting requirements as well as the fact that to date there have been very few serious cyber attacks on control systems. Most companies prefer not to share cyber attack incident data because of potential financial repercussions. Uniform reporting requirements will do much to make this information available to Department of Homeland Security (DHS) and others who require it. This report summarizes the rise in frequency of cyber attacks, describes the perpetrators, and identifies the means of attack. This type of analysis, when used in conjunction with vulnerability analyses, can be used to support a proactive approach to prevent cyber attacks. CSSC will use this document to evolve a standardized approach to incident reporting and analysis. This document will be updated as needed to record additional event analyses and insights regarding incident reporting. This report represents 120 cyber security incidents documented in a number of sources, including: the British Columbia Institute of Technology (BCIT) Industrial Security Incident Database, the 2003 CSI/FBI Computer Crime and Security Survey, the KEMA, Inc., Database, Lawrence Livermore National Laboratory, the Energy Incident Database, the INL Cyber Incident Database, and other open-source data. The National Memorial Institute for the Prevention of Terrorism (MIPT) database was also interrogated but, interestingly, failed to yield any cyber attack incidents. The results of this evaluation indicate that historical evidence provides insight into control system related incidents or failures; however, that the limited available information provides little support to future risk estimates. The documented case history shows that activity has increased significantly since 1988. The majority of incidents come from the Internet by way of opportunistic viruses, Trojans, and worms, but a surprisingly large number are directed acts of sabotage. A substantial number of confirmed, unconfirmed, and potential events that directly or potentially impact control systems worldwide are also identified. Twelve selected cyber incidents are presented at the end of this report as examples of the documented case studies (see Appendix B).

Robert J. Turk

2005-10-01T23:59:59.000Z

242

Electromagnetic Analysis For The Design Of ITER Diagnostic Port Plugs During Plasma Disruptions  

SciTech Connect (OSTI)

ITER diagnostic port plugs perform many functions including structural support of diagnostic systems under high electromagnetic loads while allowing for diagnostic access to plasma. The design of diagnotic equatorial port plugs (EPP) are largely driven by electromagnetic loads and associate response of EPP structure during plasma disruptions and VDEs. This paper summarizes results of transient electromagnetic analysis using Opera 3d in support of the design activities for ITER diagnostic EPP. A complete distribution of disruption loads on the Diagnostic First Walls (DFWs). Diagnostic Shield Modules (DSMs) and the EPP structure, as well as impact on the system design integration due to electrical contact among various EPP structural components are discussed.

Zhai, Y

2014-03-03T23:59:59.000Z

243

Bounds on the map threshold of iterative decoding systems with erasure noise  

E-Print Network [OSTI]

BOUNDS ON THE MAP THRESHOLD OF ITERATIVE DECODING SYSTEMS WITH ERASURE NOISE A Thesis by CHIA-WEN WANG Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements for the degree of MASTER OF SCIENCE... August 2008 Major Subject: Electrical Engineering BOUNDS ON THE MAP THRESHOLD OF ITERATIVE DECODING SYSTEMS WITH ERASURE NOISE A Thesis by CHIA-WEN WANG Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment...

Wang, Chia-Wen

2008-10-10T23:59:59.000Z

244

Electromagnetic Analysis of ITER Diagnostic Equatorial Port Plugs During Plasma Disruptions  

SciTech Connect (OSTI)

ITER diagnostic port plugs perform many functionsincluding structural support of diagnostic systems under high electromagnetic loads while allowing for diagnostic access to the plasma. The design of diagnostic equatorial port plugs (EPP) are largely driven by electromagnetic loads and associate responses of EPP structure during plasma disruptions and VDEs. This paper summarizes results of transient electromagnetic analysis using Opera 3d in support of the design activities for ITER diagnostic EPP. A complete distribution of disruption loads on the Diagnostic First Walls (DFWs), Diagnostic Shield Modules (DSMs) and the EPP structure, as well as impact on the system design integration due to electrical contact among various EPP structural components are discussed.

Y. Zhai, R. Feder, A. Brooks, M. Ulrickson, C.S. Pitcher and G.D. Loesser

2012-08-27T23:59:59.000Z

245

Development of a mirror-based endoscope for divertor spectroscopy on JET with the new ITER-like wall (invited)  

E-Print Network [OSTI]

CO2 plasma by laser driven plasma wind tunnel J. Appl. Phys. 112, 033301 (2012) Additional, Abingdon, OX14 3DB, United Kingdom 1 Institute of Energy and Climate Research ­ Plasma Physics the implementation of the ITER-like wall in 2011. The endoscope is a prototype for testing an ITER relevant design

246

ITER: Japan to assign 20 percent of construction work to EU firms; Proposal for EU official to assume chief executive  

E-Print Network [OSTI]

ITER: Japan to assign 20 percent of construction work to EU firms; Proposal for EU official to assume chief executive position MAINICHI (Top Play) (Lead para.) December 7, 2004 Japan and the European Experimental Reactor (ITER). Japan yesterday revealed the details of a proposal to host the project. Tokyo has

247

FOIASI - Special Inquiry Review of Allegations Involving  

Broader source: Energy.gov (indexed) [DOE]

FOIASI - Special Inquiry Review of Allegations Involving FOIASI - Special Inquiry Review of Allegations Involving PotentialMisconduct by a Senior Office of Environmental Management Official FOIASI - Special Inquiry Review of Allegations Involving PotentialMisconduct by a Senior Office of Environmental Management Official In September 2009, the Office of Inspector General (OIG) received multiple allegations concerning improprieties by a senior official with the Office of Environmental Management. The allegations involved potential violations of political activity restrictions, lack of impartiality in performing official duties, misuse of position, and other related misconduct. Specific allegations concerned: 1. Orchestrating a $9 million American Recovery and Reinvestment Act of 2009 (Recovery Act) payment to certain Historically

248

Public Involvement and Communications Committee Page 1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3, 2011 FINAL WEBINAR SUMMARY HANFORD ADVISORY BOARD PUBLIC INVOLVEMENT & COMMUNICATIONS COMMITTEE MEETING October 3, 2011 Topics in this Meeting Summary Welcome, introductions,...

249

Public Involvement and Communications Committee Page 1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

8, 2012 FINAL MEETING SUMMARY HANFORD ADVISORY BOARD PUBLIC INVOLVEMENT & COMMUNICATIONS COMMITTEE MEETING February 8, 2012 Richland, WA Topics in this Meeting Summary Welcome and...

250

Public Involvement and Communications Committee Page 1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

11, 2011 FINAL MEETING SUMMARY HANFORD ADVISORY BOARD PUBLIC INVOLVEMENT & COMMUNICATIONS COMMITTEE MEETING October 11, 2011 Richland, WA Topics in this Meeting Summary Welcome and...

251

Workplace Charging Challenge Partner: JLA Public Involvement...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

(PEV) and installing a charging station has expanded JLA Public Involvement's sustainability efforts and allowed them to achieve Gold certification in the City of Portland's...

252

The Japan Times Printer Friendly Articles France has won the competition to host the International Thermonuclear Experimental Reactor (ITER), the world's first nuclear-  

E-Print Network [OSTI]

the International Thermonuclear Experimental Reactor (ITER), the world's first nuclear- fusion reactor. Japan fought wins by withdrawing ITER bid Thermonuclear fusion utilizes the same process that powers the sun

253

EXPERIMENTALSTUDY OF THE EFFECTIVETHERMAL CONDUCTIVITYOFA PACKED BED AS A TEMPERATURECONTROL MECHANISMFOR ITER CERAMICBREEDERBLANKETDESIGNS *  

E-Print Network [OSTI]

to maximize reli- ability. A novel and practical concept was proposed for the thermal resistance gap between were used as alternate low thermal conductivity gases. With this set of materials, a good range the coolant and solid breeder to allow their operating temperatures to be optimized for ITER.[11 This thermal

Raffray, A. René

254

U.S. PARTICIPATION IN THE ITER TEST BLANKET MODULE (TBM) PROGRAM  

E-Print Network [OSTI]

the first EXPERIMENTAL data on the feasibility of the DT cycle for fusion. A decision on the types of TBMs to evaluating the feasibility, constraints, and potential of the DT cycle for fusion systems (including and the development of fusion energy. TBMs will be inserted in ITER from "Day 1" of its operation and will provide

Abdou, Mohamed

255

Improving DVB-S2 Performance Through Constellation Shaping and Iterative Demapping  

E-Print Network [OSTI]

of increasing average energy and uses a shaping code to select signals from the lower energy sub- constellations more often than the signals from higher energy sub-constellations. Our previous work in [6] on shapingImproving DVB-S2 Performance Through Constellation Shaping and Iterative Demapping Xingyu Xiang

Valenti, Matthew C.

256

Disruption mitigation for ITER Disruptions are sudden unplanned terminations of the plasma that can  

E-Print Network [OSTI]

damage the plasma chamber from thermal loads, high magnetic forces, and runaway electrons. A reliable fast acting tool to mitigate these effects in ITER burning plasmas by the injection of large quantities be located inside a port plug for close proximity to the plasma and fast injection. Multiple injectors can

257

A E Costley ITER Diagnostics, 21st IAEA of 5 slides  

E-Print Network [OSTI]

Barnsley3, K Itami1 T Sugie1 and G Vayakis3 1) ITER International Team, Naka, Ibaraki, 311-0193, Japan 2 of phenomena have to be considered that are new to diagnostic design including: · Radiation-induced conductivity (RIC) · Radiation induced electrical degradation (RIED) · Radiation-induced electromotive force

258

Non-iterative joint decoding and signal processing: universal coding approach for channels with memory  

E-Print Network [OSTI]

in an error free manner through the use of a capacity achieving code for a memoryless channel. Computational complexity of the proposed receiver structure is less than that of one iteration of the turbo receiver. We also provide the proof showing...

Nangare, Nitin Ashok

2006-08-16T23:59:59.000Z

259

AN ITERATIVE ROUTE CONSTRUCTION AND IMPROVEMENT ALGORITHM FOR THE VEHICLE ROUTING PROBLEM WITH SOFT  

E-Print Network [OSTI]

time windows exceeds the number of available vehicles, (b) a study of cost-service tradeoffs of available vehicles, (b) a study of cost-service tradeoffs is required, and (c) the dispatcher has1 AN ITERATIVE ROUTE CONSTRUCTION AND IMPROVEMENT ALGORITHM FOR THE VEHICLE ROUTING PROBLEM

Bertini, Robert L.

260

AN ITERATIVE PERTURBATION METHOD FOR THE PRESSURE EQUATION IN THE SIMULATION OF MISCIBLE DISPLACEMENT  

E-Print Network [OSTI]

AN ITERATIVE PERTURBATION METHOD FOR THE PRESSURE EQUATION IN THE SIMULATION OF MISCIBLE by water- flooding. Since the tertiary process requires expensive chemicals and the performance of the displacement is not guaranteed, its numerical simulation plays an important role in determining whether enough

Lin, Ping

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Synthesizing Representative I/O Workloads Using Iterative Distillation Zachary Kurmas  

E-Print Network [OSTI]

Synthesizing Representative I/O Workloads Using Iterative Distillation Zachary Kurmas College proper- ties are "key" for a given workload and storage system. We have developed a tool, the Distiller, that automati- cally identifies the key properties ("attribute-values") of the workload. The Distiller then uses

Kurmas, Zachary

262

State-of-the-art in Chaotic Iterations based pseudorandom numbers generators Application in Information Hiding  

E-Print Network [OSTI]

State-of-the-art in Chaotic Iterations based pseudorandom numbers generators Application requires an intensive use of pseudoran- dom number generators having strong security properties. For instance, these generators are used to produce encryption keys, to encrypt data with a one-time pad process

Paris-Sud XI, Université de

263

Evolution of cooperation, differentiation, complexity, and diversity in an iterated three-person game  

Science Journals Connector (OSTI)

A nonzero-sum three-person coalition game is presented to study the evolution of complexity and diversity in cooperation, where the population dynamics of players with strategies is given according to their scores in the iterated game and mutations. ...

Eizo Akiyama; Kunihiko Kaneko

1995-01-01T23:59:59.000Z

264

ITER-like wall sliced beryllium tiles The JET Enhanced Performance 2 (EP2) shutdown  

E-Print Network [OSTI]

ITER-like wall sliced beryllium tiles Background The JET Enhanced Performance 2 (EP2) shutdown and remote handling equipment. JET remote handling systems #12;Outcome The EP2 shutdown was successful of the remote handling system are compatible with the required component manipulation. Pre EP2 shutdown Mid

265

Improved Confinement in JET High {beta} Plasmas with an ITER-Like Wall  

E-Print Network [OSTI]

The replacement of the JET carbon wall (C-wall) by a Be/W ITER-like wall (ILW) has affected the plasma energy confinement. To investigate this, experiments have been performed with both the C-wall and ILW to vary the heating power over a wide range for plasmas with different shapes.

Challis, C D; Beurskens, M; Buratti, P; Delabie, E; Drewelow, P; Frassinetti, L; Giroud, C; Hawkes, N; Hobirk, J; Joffrin, E; Keeling, D; King, D B; Maggi, C F; Mailloux, J; Marchetto, C; McDonald, D; Nunes, I; Pucella, G; Saarelma, S; Simpson, J

2015-01-01T23:59:59.000Z

266

Paradigm Changes in High Temperature Plasma Physics Research and Implications for ITER  

SciTech Connect (OSTI)

Significant high temperature plasma research in both the magnetic and inertial confinement regimes led to the official launching of the International Thermonuclear Experimental Reactor (ITER) project which is aimed at challenging controlled fusion power for human kind. In particular, such an endeavor originated from the fruitful research outcomes from the world wide magnetic confinement devices (primarily based on the Tokamak approach) mainly in advanced countries (US, EU, and Japan). In recent years, all new steady state capable Tokamak devices are operated and/or constructed in Asian countries and incidentally, the majority of the ITER consortium consists of Asian countries. This provides an opportunity to revisit the unresolved essential physics issues and/or extend the understanding of the transient physics to the required steady state operation so that ITER can benefit from these efforts. The core physics of a magnetically confined hot plasma has two essential components; plasma stability and cross-field energy transport physics. Complete understanding of these two areas is critical for the successful operation of ITER and perhaps, Demo reactor construction. In order to have stable high beta plasmas with a sufficiently long confinement time, the physics of an abrupt disruption and sudden deterioration of the energy transport must be understood and conquered. Physics issues associated with transient harmful MHD behavior and turbulence based energy transport are extremely complicated and theoretical understanding needs a clear validation and verification with a new research approach such as a multi-dimensional visualization.

Hyeon K. Park

2008-02-22T23:59:59.000Z

267

SCUBA-2: iterative map-making with the Sub-Millimetre User Reduction Facility  

Science Journals Connector (OSTI)

......Agricultural Road, Vancouver...the instrument design, performance...slowly than the crossing times for the...experimental designs fast iterative...such as the pipeline recipe for fitting...smurf to run in a pipeline setting without...the Critical Design Review panel......

Edward L. Chapin; David S. Berry; Andrew G. Gibb; Tim Jenness; Douglas Scott; Remo P. J. Tilanus; Frossie Economou; Wayne S. Holland

2013-01-01T23:59:59.000Z

268

Generics, habituals, and iteratives Sentences may express information about particular events, such as  

E-Print Network [OSTI]

cough or flap (a wing)'. In English, John coughed can be understood as saying that he coughed once implications, especially those of intensity and/or prolongation. In English, John coughed and coughed is iterative in interpretation, like one understanding of the simple John coughed, but in addition implies

Makous, Walter

269

Iterative method for evaluating the matrix representation of the generators in the unitary-group approach  

Science Journals Connector (OSTI)

An iterative method is presented for the evaluation of the matrix representation of the group generators in the unitary-group approach to many-electron systems. The method yields, in addition, closed-form expressions and selection rules for nonvanishing matrix elements. Generator products (two-body operators) are treated by a scalar-product method.

A. Lev; M. Schlesinger; R. D. Kent

1984-12-01T23:59:59.000Z

270

Coherence and Conservatism in the Dynamics of Belief II: Iterated Belief Change without Dispositional Coherence  

Science Journals Connector (OSTI)

......University Press 2003 Original Article Coherence and Conservatism in the Dynamics of Belief...Iterated Belief Change without Dispositional Coherence Hans Rott 1 1 Department of Philosophy...based on the conclusions of Rott, Coherence and Conservatism in the Dynamics of Belief......

Hans Rott

2003-02-01T23:59:59.000Z

271

Coherence and Conservatism in the Dynamics of Belief II: Iterated Belief Change  

E-Print Network [OSTI]

Coherence and Conservatism in the Dynamics of Belief II: Iterated Belief Change Without Dispositional Coherence Hans Rott 3 April 2002, 17:07 1 Introduction Part I of this paper (Rott 1999) has argued of coherence that are (partially) encoded by them. We noticed that contrary to the common opin- ion

Schubart, Christoph

272

ADAPTIVE REGULARIZED SELF-CONSISTENT FIELD ITERATION WITH EXACT HESSIAN FOR ELECTRONIC STRUCTURE CALCULATION  

E-Print Network [OSTI]

18, 65K10, 65F15, 90C26, 90C30 1. Introduction. Electronic structure calculations have becomeADAPTIVE REGULARIZED SELF-CONSISTENT FIELD ITERATION WITH EXACT HESSIAN FOR ELECTRONIC STRUCTURE CALCULATION ZAIWEN WEN, ANDRE MILZAREK, MICHAEL ULBRICH, AND HONGCHAO ZHANGďż˝ Abstract. The self

Ulbrich, Michael

273

A remotely steered millimetre wave launcher for electron cyclotron heating and current drive on ITER  

Science Journals Connector (OSTI)

High-power millimetre wave beams employed on ITER for heating and current drive at the 170 GHz electron cyclotron resonance frequency require agile steering and tight focusing of the beams to suppress neoclassical tearing modes. This paper presents experimental validation of the remote steering (RS) concept of the ITER upper port millimetre wave beam launcher. Remote steering at the entrance of the upper port launcher rather than at the plasma side offers advantages in reliability and maintenance of the mechanically vulnerable steering system. A one-to-one scale mock-up consisting of a transmission line, mitre bends, remote steering unit, vacuum window, square corrugated waveguide and front mirror simulates the ITER launcher design configuration. Validation is based on low-power heterodyne measurements of the complex amplitude and phase distribution of the steered Gaussian beam. High-power (400 kW) short pulse (10 ms) operation under vacuum, diagnosed by calorimetry and thermography of the near- and far-field beam patterns, confirms high-power operation, but shows increased power loss attributed to deteriorating input beam quality compared with low-power operation. Polarization measurements show little variation with steering, which is important for effective current drive requiring elliptical polarization for O-mode excitation. Results show that a RS range of up to ?12° to +12° can be achieved with acceptable beam quality. These measurements confirm the back-up design of the ITER ECRH&CD launcher with future application for DEMO.

W.A. Bongers; M.F. Graswinckel; A.P.H. Goede; W. Kasparek; I. Danilov; Á. Fernández Curto; M.R. de Baar; M.A. van den Berg; A.J.H. Donné; B.S.Q. Elzendoorn; R. Heidinger; P. Ivanov; O.G. Kruijt; B. Lamers; A. Meier; B. Piosczyk; B. Plaum; D.M.S. Ronden; D.J. Thoen; M. Schmid; A.G.A. Verhoeven

2010-01-01T23:59:59.000Z

274

Electron-cyclotron wave scattering by edge density fluctuations in ITER Christos Tsironis,1,2  

E-Print Network [OSTI]

influence on localized heating and current drive. A wave used for electron-cyclotron current drive ECCD must. doi:10.1063/1.3264105 I. INTRODUCTION In the electron-cyclotron resonance heating ECRH sys- temElectron-cyclotron wave scattering by edge density fluctuations in ITER Christos Tsironis,1

Isliker, Heinz

275

Fabrication of the First US ITER TF Conductor Sample for Qualification in SULTAN Facility  

E-Print Network [OSTI]

A pair of 3.5 m long ITER TF size straight conductors has been fabricated into a conductor short sample and submitted to the SULTAN facility at CRPP for cold test. The sample used a triplet-based cabling pattern in one leg ...

Miller, John R.

276

Japan ready to pay 895 million dollars more to host ITER project: report  

E-Print Network [OSTI]

Japan ready to pay 895 million dollars more to host ITER project: report 26 May 2004 Japan the deadlock between Japan and the European Union over the venue of the International Thermonuclear in the 10-billion-dollar project are the European Union, Japan, China, Russia, South Korea and the United

277

Small Mock-Up Fabrication and High Heat Flux Test for Preparing the 2nd Qualification of the ITER Blanket First Wall  

Science Journals Connector (OSTI)

ITER Systems / Proceedings of the Nineteenth Topical Meeting on the Technology of Fusion Energy (TOFE) (Part 1)

Dong Won Lee; Suk Kwon Kim; Young-Dug Bae; Yang Il Jung; Jeong Yong Park; Yong Hwan Jeong; Byung Yoon Kim

278

Revisiting Stopping Rules for Iterative Methods used in Emission Tomography  

E-Print Network [OSTI]

Recon, Inc., 60 Hazelwood Dr., Champaign, IL 61820, USA b Arizona State University, School of Mathematical, [2], and yields the maximum likelihood (ML) model with the expec- tation maximization (EM) algorithm subsets EM, (OSEM) [3, 4], has been adopted by a number of manufacturers [5]. Still many important issues

Renaut, Rosemary

279

Building an MLR Model Building a multiple linear regression (MLR) model from data is one of the  

E-Print Network [OSTI]

Chapter 3 Building an MLR Model Building a multiple linear regression (MLR) model from data is one- imation to the data can be difficult. Model building is an iterative process. Given the problem and data but no model, the model building process can often be aided by graphs that help visualize the relationships

Olive, David

280

Estimators for models with constraints involving unknown parameters  

E-Print Network [OSTI]

- tor of real numbers. Such estimators have asymptotic variance P(f - c a)2 . If Paa is invertible, then by the Cauchy­Schwarz inequality the asymptotic variance is minimized for cf = (Paa )-1 Paf. The constant cf ^cf = ( ^Paa )-1 ^Paf = n i=1 a(Xi)a(Xi) -1 n i=1 a(Xi)f(Xi). The resulting estimator ^P(f -^cf a) has

Wefelmeyer, Wolfgang

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Public Involvement Plan | Department of Energy  

Energy Savers [EERE]

Involvement Plan is updated, prepared, and published by the U.S. Department of Energy Oak Ridge Office of Environmental Management (DOE-OREM) to communicate to you, as a member...

282

UT gets involved at Oak Ridge  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

UT gets involved at Oak Ridge In 1947, the Atomic Energy Commission took over Oak Ridge from the Manhattan Project's General Groves and Colonel Nichols. The struggle to maintain...

283

Factors Involved in Search Dog Training  

E-Print Network [OSTI]

involved in training competent search dogs. Obedience training methods, age training was initiated, previous handler canine training experience, and handler perception and emotional attachment to their search dog were examined through a sixty-six question...

Alexander, Michael B.

2010-07-14T23:59:59.000Z

284

arXiv:hep-ex/0211027v111Nov2002 Search for neutrinoless decays involving the K0  

E-Print Network [OSTI]

arXiv:hep-ex/0211027v111Nov2002 1 Search for neutrinoless decays involving the K0 S meson K neutrinoless LFV modes within a model involving heavy Dirac neutrinos. The branching fractions depend

285

Comparisons of Predicted Plasma Performance in ITER H-mode Plasmas with Various Mixes of External He  

SciTech Connect (OSTI)

Performance in H-mode DT plasmas in ITER with various choices of heating systems are predicted and compared. Combinations of external heating by Negative Ion Neutral Beam Injection (NNBI), Ion Cyclotron Range of Frequencies (ICRF), and Electron Cyclotron Heating (ECH) are assumed. Scans with a range of physics assumptions about boundary temperatures in the edge pedestal, alpha ash transport, and toroidal momentum transport are used to indicate effects of uncertainties. Time-dependent integrated modeling with the PTRANSP code is used to predict profiles of heating, beam torque, and plasma profiles. The GLF23 model is used to predict temperature profiles. Either GLF23 or the assumption of a constant ratio for ?ř/?i is used to predict toroidal rotation profiles driven by the beam torques. Large differences for the core temperatures are predicted with different mixes of the external heating during the density and current ramp-up phase, but the profiles are similar during the flattop phase. With ?ř/?i = 0.5, the predicted toroidal rotation is relatively slow and the flow shear implied by the pressure, toroidal rotation, and neoclassical poloidal rotation are not sufficient to cause significant changes in the energy transport or steady state temperature profiles. The GLF23-predicted toroidal rotation is faster by a factor of six, and significant flow shear effects are predicted.

R.V. Budny

2009-03-20T23:59:59.000Z

286

Nonlinear control and online optimization of the burn condition in ITER via heating, isotopic fueling and impurity injection  

Science Journals Connector (OSTI)

The ITER tokamak, the next experimental step toward the development of nuclear fusion reactors, will explore the burning plasma regime in which the plasma temperature is sustained mostly by fusion heating. Regulation of the fusion power through modulation of fueling and external heating sources, referred to as burn control, is one of the fundamental problems in burning plasma research. Active control will be essential for achieving and maintaining desired operating points, responding to changing power demands, and ensuring stable operation. Most existing burn control efforts use either non-model-based control techniques or designs based on linearized models. These approaches must be designed for particular operating points and break down for large perturbations. In this work, we utilize a spatially averaged (zero-dimensional) nonlinear model to synthesize a multi-variable nonlinear burn control strategy that can reject large perturbations and move between operating points. The controller uses all of the available actuation techniques in tandem to ensure good performance, even if one or more of the actuators saturate. Adaptive parameter estimation is used to improve the model parameter estimates used by the feedback controller in real-time and ensure asymptotic tracking of the desired operating point. In addition, we propose the use of a model-based online optimization algorithm to drive the system to a state that minimizes a given cost function, while respecting input and state constraints. A zero-dimensional simulation study is presented to show the performance of the adaptive control scheme and the optimization scheme with a cost function weighting the fusion power and temperature tracking errors.

Mark D Boyer; Eugenio Schuster

2014-01-01T23:59:59.000Z

287

In-Vessel Coil Material Failure Rate Estimates for ITER Design Use  

SciTech Connect (OSTI)

The ITER international project design teams are working to produce an engineering design for construction of this large tokamak fusion experiment. One of the design issues is ensuring proper control of the fusion plasma. In-vessel magnet coils may be needed for plasma control, especially the control of edge localized modes (ELMs) and plasma vertical stabilization (VS). These coils will be lifetime components that reside inside the ITER vacuum vessel behind the blanket modules. As such, their reliability is an important design issue since access will be time consuming if any type of repair were necessary. The following chapters give the research results and estimates of failure rates for the coil conductor and jacket materials to be used for the in-vessel coils. Copper and CuCrZr conductors, and stainless steel and Inconel jackets are examined.

L. C. Cadwallader

2013-01-01T23:59:59.000Z

288

Irradiation tests of ITER candidate Hall sensors using two types of neutron spectra  

SciTech Connect (OSTI)

We report on irradiation tests of InSb based Hall sensors at two irradiation facilities with two distinct types of neutron spectra. One was a fission reactor neutron spectrum with a significant presence of thermal neutrons, while another one was purely fast neutron field. Total neutron fluence of the order of 10{sup 16} cm{sup -2} was accumulated in both cases, leading to significant drop of Hall sensor sensitivity in case of fission reactor spectrum, while stable performance was observed at purely fast neutron spectrum. This finding suggests that performance of this particular type of Hall sensors is governed dominantly by transmutation. Additionally, it further stresses the need to test ITER candidate Hall sensors under neutron flux with ITER relevant spectrum.

Duran, I. [Institute of Plasma Physics AS CR, v. v. i., Association EURATOM/IPP.CR, 182 00 Prague 8 (Czech Republic); Bolshakova, I.; Holyaka, R. [Magnetic Sensor Laboratory, Lviv Polytechnic National University, 790 31 Lviv (Ukraine); Viererbl, L.; Lahodova, Z. [Nuclear Research Institute plc., 250 68 Husinec-Rez (Czech Republic); Sentkerestiova, J. [Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, 115 19 Prague 1 (Czech Republic); Bem, P. [Nuclear Physics Institute AS CR, v. v. i., 250 68 Husinec-Rez (Czech Republic)

2010-10-15T23:59:59.000Z

289

Clover Action for Blue Gene-Q and Iterative solvers for DWF  

E-Print Network [OSTI]

In Lattice QCD, a major challenge in simulating physical quarks is the computational complexity of these simulations. In this proceeding, we describe the optimisation of Clover fermion action for Blue gene-Q architecture and how different iterative solvers behave for Domain Wall Fermion action. We find that the optimised Clover term achieved a maximum efficiency of 29.1% and 20.2% for single and double precision respectively for iterative Conjugate Gradient solver. For Domain Wall Fermion action (DWF) we found that Modified Conjugate Residual(MCR) as the most efficient solver compared to CG and GCR. We have developed a new multi-shift MCR algorithm that is 18.5% faster compared to multi-shift CG for the evaluation of rational functions in RHMC.

Karthee Sivalingam; Peter Boyle

2014-08-28T23:59:59.000Z

290

Effect of turbulence on electron cyclotron current drive and heating in ITER  

E-Print Network [OSTI]

Non-linear local electromagnetic gyrokinetic turbulence simulations of the ITER standard scenario H-mode are presented for the q=3/2 and q=2 surfaces. The turbulent transport is examined in regions of velocity space characteristic of electrons heated by electron cyclotron waves. Electromagnetic fluctuations and sub-dominant micro-tearing modes are found to contribute significantly to the transport of the accelerated electrons, even though they have only a small impact on the transport of the bulk species. The particle diffusivity for resonant passing electrons is found to be less than 0.15 m^2/s, and their heat conductivity is found to be less than 2 m^2/s. Implications for the broadening of the current drive and energy deposition in ITER are discussed.

Casson, F J; Angioni, C; Buchholz, R; Peeters, A G

2014-01-01T23:59:59.000Z

291

Nonlinear Projective-Iteration Methods for Solving Transport Problems on Regular and Unstructured Grids  

SciTech Connect (OSTI)

This is a project in the field of fundamental research on numerical methods for solving the particle transport equation. Numerous practical problems require to use unstructured meshes, for example, detailed nuclear reactor assembly-level calculations, large-scale reactor core calculations, radiative hydrodynamics problems, where the mesh is determined by hydrodynamic processes, and well-logging problems in which the media structure has very complicated geometry. Currently this is an area of very active research in numerical transport theory. main issues in developing numerical methods for solving the transport equation are the accuracy of the numerical solution and effectiveness of iteration procedure. The problem in case of unstructured grids is that it is very difficult to derive an iteration algorithm that will be unconditionally stable.

Dmitriy Y. Anistratov; Adrian Constantinescu; Loren Roberts; William Wieselquist

2007-04-30T23:59:59.000Z

292

Nested (inverse) binomial sums and new iterated integrals for massive Feynman diagrams  

E-Print Network [OSTI]

Nested sums containing binomial coefficients occur in the computation of massive operator matrix elements. Their associated iterated integrals lead to alphabets including radicals, for which we determined a suitable basis. We discuss algorithms for converting between sum and integral representations, mainly relying on the Mellin transform. To aid the conversion we worked out dedicated rewrite rules, based on which also some general patterns emerging in the process can be obtained.

Jakob Ablinger; Johannes Blümlein; Clemens G. Raab; Carsten Schneider

2014-07-17T23:59:59.000Z

293

F-Race and Iterated F-Race: An Overview Mauro Birattari, Zhi Yuan, Prasanna Balaprakash, and Thomas Sttzle  

E-Print Network [OSTI]

Chapter 13 F-Race and Iterated F-Race: An Overview Mauro Birattari, Zhi Yuan, Prasanna Balaprakash search algorithms in Mauro Birattari · Zhi Yuan · Prasanna Balaprakash · Thomas Stützle IRIDIA, Co

Birattari, Mauro

294

Going with the group in a competitive game of iterated reasoning Seth Frey (sethfrey@indiana.edu)  

E-Print Network [OSTI]

Going with the group in a competitive game of iterated reasoning Seth Frey (sethfrey their strategy individually. John Nash proved that every game has at least one such equilib- rium. Mapped onto

Goldstone, Robert

295

Detailed search US supports Japanese bid to host ITER as France urges Europe to go it alone  

E-Print Network [OSTI]

support of his country for the Japanese bid to host the international thermonuclear site (ITER thermonuclear site if the French candidate is not selected for the international project. However

296

Characteristics of the Arrangement of the Cooling Water Piping System for ITER and Fusion Reactor Power Station  

Science Journals Connector (OSTI)

The ITER has been designed to demonstrate the scientific and technical feasibility of nuclear fusion energy conversion using the tokamak magnetic machine. ... experience will guide the realization of a future fusion

K. P. Chang; Ingo Kuehn; W. Curd…

2008-01-01T23:59:59.000Z

297

An iterative algorithm for model-based predictive control of an electro-pneumatic valve actuator  

Science Journals Connector (OSTI)

The benefits of utilizing camless valve actuations for internal combustion engines are primarily due to their ability of significantly improving engine performance. There are mainly three kinds of camless valve actuators: electro-magnetic, electro-hydraulic, ...

Guoming G. Zhu; Jia Ma; Harold Schock

2009-06-01T23:59:59.000Z

298

An iterative method for the construction of N-body galaxy models in collisionless equilibrium  

Science Journals Connector (OSTI)

......systems in this paper, and also assume mirror symmetry with respect to the z...Compared to alternative schemes like the Schwarzschild method, our approach eliminates restrictions...be considerably less restrictive than Schwarzschild's method because the requirement to......

Denis Yurin; Volker Springel

2014-01-01T23:59:59.000Z

299

Lessons learnt from ITER safety & licensing for DEMO and future nuclear fusion facilities  

E-Print Network [OSTI]

One of the strong motivations for pursuing the development of fusion energy is its potentially low environmental impact and very good safety performance. But this safety and environmental potential can only be fully realized by careful design choices. For DEMO and other fusion facilities that will require nuclear licensing, S&E objectives and criteria should be set at an early stage and taken into account when choosing basic design options and throughout the design process. Studies in recent decades of the safety of fusion power plant concepts give a useful basis on which to build the S&E approach and to assess the impact of design choices. The experience of licensing ITER is of particular value, even though there are some important differences between ITER and DEMO. The ITER project has developed a safety case, produced a preliminary safety report and had it examined by the French nuclear safety authorities, leading to the licence to construct the facility. The key technical issues that arose during ...

Taylor, Neill

2013-01-01T23:59:59.000Z

300

A population-based iterated greedy algorithm for the minimum weight vertex cover problem  

Science Journals Connector (OSTI)

Given an undirected, vertex-weighted graph, the goal of the minimum weight vertex cover problem is to find a subset of the vertices of the graph such that the subset is a vertex cover and the sum of the weights of its vertices is minimal. This problem is known to be NP-hard and no efficient algorithm is known to solve it to optimality. Therefore, most existing techniques are based on heuristics for providing approximate solutions in a reasonable computation time. Population-based search approaches have shown to be effective for solving a multitude of combinatorial optimization problems. Their advantage can be identified as their ability to find areas of the space containing high quality solutions. This paper proposes a simple and efficient population-based iterated greedy algorithm for tackling the minimum weight vertex cover problem. At each iteration, a population of solutions is established and refined using a fast randomized iterated greedy heuristic based on successive phases of destruction and reconstruction. An extensive experimental evaluation on a commonly used set of benchmark instances shows that our algorithm outperforms current state-of-the-art approaches.

Salim Bouamama; Christian Blum; Abdellah Boukerram

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Progress in engineering design of Indian LLCB TBM set for testing in ITER  

Science Journals Connector (OSTI)

Abstract The Indian Lead–Lithium Ceramic Breeder (LLCB) Test Blanket Module (TBM) is the Indian DEMO relevant blanket module, as a part of the TBM program in ITER. The LLCB TBM will be tested from the first phase of ITER operation in one-half of an ITER port no. 2. LLCB TBM-set consists of LLCB TBM module and shield block, which are attached with the help of attachment systems. This LLCB TBM set is inserted in a water-cooled stainless steel frame called ‘TBM frame’, which also provides the separation between the neighboring TBM-sets (Chinese TBM set) in port no. 2. In LLCB TBM, high-pressure helium gas is used to cool the first wall (FW) structure and lead–lithium eutectic (Pb–Li) flowing separately around the ceramic breeder (CB) pebble bed to cool the TBM internals which are heated due to the volumetric neutron heating during plasma operation. Low-pressure helium is purged inside the CB zones to extract the bred tritium. Thermal-structural analyses have been performed independently on LLCB TBM and shield block for TBM set using ANSYS. This paper will also describe the performance analysis of individual components of LLCB TBM set and their different configurations to optimize their performances.

Paritosh Chaudhuri; S. Ranjithkumar; Deepak Sharma; Chandan Danani; H.L. Swami; R. Bhattacharya; Anita Patel; E. Rajendra Kumar; K.N. Vyas

2014-01-01T23:59:59.000Z

302

High power millimeter wave experiment of ITER relevant electron cyclotron heating and current drive system  

SciTech Connect (OSTI)

High power, long pulse millimeter (mm) wave experiments of the RF test stand (RFTS) of Japan Atomic Energy Agency (JAEA) were performed. The system consists of a 1 MW/170 GHz gyrotron, a long and short distance transmission line (TL), and an equatorial launcher (EL) mock-up. The RFTS has an ITER-relevant configuration, i.e., consisted by a 1 MW-170 GHz gyrotron, a mm wave TL, and an EL mock-up. The TL is composed of a matching optics unit, evacuated circular corrugated waveguides, 6-miter bends, an in-line waveguide switch, and an isolation valve. The EL-mock-up is fabricated according to the current design of the ITER launcher. The Gaussian-like beam radiation with the steering capability of 20 deg. - 40 deg. from the EL mock-up was also successfully proved. The high power, long pulse power transmission test was conducted with the metallic load replaced by the EL mock-up, and the transmission of 1 MW/800 s and 0.5 MW/1000 s was successfully demonstrated with no arcing and no damages. The transmission efficiency of the TL was 96%. The results prove the feasibility of the ITER electron cyclotron heating and current drive system.

Takahashi, K.; Kajiwara, K.; Oda, Y.; Kasugai, A.; Kobayashi, N.; Sakamoto, K. [Japan Atomic Energy Agency, 801-1 Mukoyama, Naka, Ibaraki 311-0193 (Japan); Doane, J.; Olstad, R. [General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States); Henderson, M. [ITER Organization, CS90 046, 13067 St. Paul lez Durance Cedex (France)

2011-06-15T23:59:59.000Z

303

Decontamination Dressdown at a Transportation Accident Involving  

Broader source: Energy.gov (indexed) [DOE]

Decontamination Dressdown at a Transportation Accident Involving Decontamination Dressdown at a Transportation Accident Involving Radioactive Material Decontamination Dressdown at a Transportation Accident Involving Radioactive Material The purpose of this User's Guide is to provide instructors with an overview of the key points covered in the video. The Student Handout portion of this Guide is designed to assist the instructor in reviewing those points with students. The Student Handout should be distributed to students after the video is shown and the instructor should use the Guide to facilitate a discussion on how the decontamination dressdown process is implemented. During this discussion, the instructor can present various scenarios, each of which would discuss decontamination at the accident scene. The purpose of this discussion would be to cover how responders

304

INTRODUCTION In detonation wave computations involving  

E-Print Network [OSTI]

INTRODUCTION In detonation wave computations involving curved detonation fronts, accurate solutions to compute solutions to detonation prob­ lems without numerically resolving the reaction zone. For planar detonation waves, algebraic jump conditions which do not depend on the dynamics within the reaction zone can

Bukiet, Bruce

305

Fire Classifications Fires involving the ordinary  

E-Print Network [OSTI]

, plastics, etc. Fires involving combustible or flammable liquids such as gasoline, kerosene, oils, grease is protected by various devices such as smoke detectors, sprinkler systems, and manual fire alarm pull stations. Manual pull stations are strategically located throughout the University. Usually located by each exit

Jia, Songtao

306

Production of Meson Pairs Involving $L \  

E-Print Network [OSTI]

We present a formalism for studying the exclusive production or decay of mesons with any value of the internal orbital angular momentum L. As an application, we discuss the production of meson pairs (involving tensor and pseudotensor mesons) in photon-photon collisions.

Houra-Yaou, L; Parisi, J; Murgia, F; Hansson, J

1997-01-01T23:59:59.000Z

307

Fast wave direct electron heating in advanced inductive and ITER baseline scenario discharges in DIII-D  

SciTech Connect (OSTI)

Fast Wave (FW) heating and electron cyclotron heating (ECH) are used in the DIII-D tokamak to study plasmas with low applied torque and dominant electron heating characteristic of burning plasmas. FW heating via direct electron damping has reached the 2.5 MW level in high performance ELMy H-mode plasmas. In Advanced Inductive (AI) plasmas, core FW heating was found to be comparable to that of ECH, consistent with the excellent first-pass absorption of FWs predicted by ray-tracing models at high electron beta. FW heating at the ?2 MW level to ELMy H-mode discharges in the ITER Baseline Scenario (IBS) showed unexpectedly strong absorption of FW power by injected neutral beam (NB) ions, indicated by significant enhancement of the D-D neutron rate, while the intended absorption on core electrons appeared rather weak. The AI and IBS discharges are compared in an effort to identify the causes of the different response to FWs.

Pinsker, R. I.; Jackson, G. L.; Luce, T. C.; Politzer, P. A. [General Atomics, PO Box 85608, San Diego, California 92186-5608 (United States); Austin, M. E. [University of Texas at Austin, Austin, Texas 78712 (United States); Diem, S. J.; Kaufman, M. C.; Ryan, P. M. [Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States); Doyle, E. J.; Zeng, L. [University of California Los Angeles, Los Angeles, California 90095 (United States); Grierson, B. A.; Hosea, J. C.; Nagy, A.; Perkins, R.; Solomon, W. M.; Taylor, G. [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States); Maggiora, R.; Milanesio, D. [Politecnico di Torino, Dipartimento di Elettronica, Torino (Italy); Porkolab, M. [Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Turco, F. [Columbia University, New York, New York 10027 (United States)

2014-02-12T23:59:59.000Z

308

Coupling the Mixed Potential and Radiolysis Models for Used Fuel Degradation  

SciTech Connect (OSTI)

The primary purpose of this report is to describe the strategy for coupling three process level models to produce an integrated Used Fuel Degradation Model (FDM). The FDM, which is based on fundamental chemical and physical principals, provides direct calculation of radionuclide source terms for use in repository performance assessments. The G-value for H2O2 production (Gcond) to be used in the Mixed Potential Model (MPM) (H2O2 is the only radiolytic product presently included but others will be added as appropriate) needs to account for intermediate spur reactions. The effects of these intermediate reactions on [H2O2] are accounted for in the Radiolysis Model (RM). This report details methods for applying RM calculations that encompass the effects of these fast interactions on [H2O2] as the solution composition evolves during successive MPM iterations and then represent the steady-state [H2O2] in terms of an “effective instantaneous or conditional” generation value (Gcond). It is anticipated that the value of Gcond will change slowly as the reaction progresses through several iterations of the MPM as changes in the nature of fuel surface occur. The Gcond values will be calculated with the RM either after several iterations or when concentrations of key reactants reach threshold values determined from previous sensitivity runs. Sensitivity runs with RM indicate significant changes in G-value can occur over narrow composition ranges. The objective of the mixed potential model (MPM) is to calculate the used fuel degradation rates for a wide range of disposal environments to provide the source term radionuclide release rates for generic repository concepts. The fuel degradation rate is calculated for chemical and oxidative dissolution mechanisms using mixed potential theory to account for all relevant redox reactions at the fuel surface, including those involving oxidants produced by solution radiolysis and provided by the radiolysis model (RM). The RM calculates the concentration of species generated at any specific time and location from the surface of the fuel. Several options being considered for coupling the RM and MPM are described in the report. Different options have advantages and disadvantages based on the extent of coding that would be required and the ease of use of the final product.

Buck, Edgar C.; Jerden, James L.; Ebert, William L.; Wittman, Richard S.

2013-08-30T23:59:59.000Z

309

Sandia National Laboratories: About Sandia: Community Involvement:  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Community Involvement Community Involvement Contribution Programs Volunteer Programs Education Programs About Contribution Programs Shoes for Kids photo A tradition of employee giving Sandia National Laboratories employees and retirees are generous, contributing over $5.9 million a year through the United Way of Central New Mexico to non-profits in New Mexico, California, and the nation. Giving is a tradition at Sandia. In the 1960s, employees initiated the Shoes for Kids Program. Rather than giving each other gifts during the holidays, employees elected to contribute to a fund to provide new shoes to local elementary school children. The program has provided a new pair of shoes to over 500 Albuquerque-area children for over 50 years. Other annual programs benefiting local students include book and school supply drives.

310

Projecting Fatalities in Crashes involving Older Drivers  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Crashes Crashes Projecting Fatalities in Crashes Involving Older Drivers Involving Older Drivers Oak Oak Ridge Ridge National Laboratory National Laboratory, USA USA Presented at Presented at the the 17th 17th World Congress of the International World Congress of the International Association Association for Accident and Traffic Medicine for Accident and Traffic Medicine May May 30, 30, 2000, 2000, Stockholm, Sweden Stockholm, Sweden ORNL ORNL P. P. Hu Hu D. D. Jones Jones T. T. Reuscher Reuscher R. R. Schmoyer Schmoyer T. T. Truett Truett General General Motors Motors Annette Annette Irwin Irwin U.S. U.S. DOTransportation DOTransportation Jesse Jesse Blatt Blatt Acknowledgements Acknowledgements Objective Objective This This research research is is funded funded by by a a Cooperative Cooperative Research

311

Development of ITER 15 MA ELMy H-mode Inductive Scenario  

SciTech Connect (OSTI)

The poloidal field (PF) coil system on ITER, which provides both feedforward and feedback control of plasma position, shape, and current, is a critical element for achieving mission performance. Analysis of PF capabilities has focused on the 15 MA Q = 10 scenario with a 300-500 s flattop burn phase. The operating space available for the 15 MA ELMy H-mode plasma discharges in ITER and upgrades to the PF coils or associated systems to establish confidence that ITER mission objectives can be reached have been identified. Time dependent self-consistent free-boundary calculations were performed to examine the impact of plasma variability, discharge programming, and plasma disturbances. Based on these calculations a new reference scenario was developed based upon a large bore initial plasma, early divertor transition, low level heating in L-mode, and a late H-mode onset. Equilibrium analyses for this scenario indicate that the original PF coil limitations do not allow low li (<0.8) operation or lower flux states, and the flattop burn durations were predicted to be less than the desired 400 s. This finding motivates the expansion of the operating space, considering several upgrade options to the PF coils. Analysis was also carried out to examine the feedback current reserve required in the CS and PF coils during a series of disturbances and a feasibility assessment of the 17 MA scenario was undertaken. Results of the studies show that the new scenario and modified PF system will allow a wide range of 15 MA 300-500 s operation and more limited but finite 17 MA operation.

Kessel, C. E.; Campbell, D.; Gribov, Y.; Saibene, G.; Ambrosino, G.; Casper, T.; Cavinato, M.; Fujieda, H.; Hawryluk, R.; Horton, L. D.; Kavin, A.; Kharyrutdinov, R.; Koechl, F.; Leuer, J.; Loarte, A.; Lomas, P. J.; Luce, T.; Lukash, V.; Mattei, M.; Nunes, I.; Parail, V.; Polevoi, A.; Portone, A.; Sartori, R.; Sips, A. C.C.; Thomas, P. R.; Welander, A.; Wesley, J.

2008-10-16T23:59:59.000Z

312

Large-order shifted 1/N expansions through the asymptotic iteration method  

E-Print Network [OSTI]

The perturbation technique within the framework of the asymptotic iteration method is used to obtain large-order shifted 1/N expansions, where N is the number of spatial dimensions. This method is contrary to the usual Rayleigh-Schr\\"{o}dinger perturbation theory, no matrix elements need to be calculated. The method is applied to the Schr\\"{o}dinger equation and the non-polynomial potential $V(r)=r^2+\\frac{b r^2}{(1+cr^2)}$ in three dimensions is discussed as an illustrative example.

T. Barakat

2007-08-16T23:59:59.000Z

313

Robust parallel iterative solvers for linear and least-squares problems, Final Technical Report  

SciTech Connect (OSTI)

The primary goal of this project is to study and develop robust iterative methods for solving linear systems of equations and least squares systems. The focus of the Minnesota team is on algorithms development, robustness issues, and on tests and validation of the methods on realistic problems. 1. The project begun with an investigation on how to practically update a preconditioner obtained from an ILU-type factorization, when the coefficient matrix changes. 2. We investigated strategies to improve robustness in parallel preconditioners in a specific case of a PDE with discontinuous coefficients. 3. We explored ways to adapt standard preconditioners for solving linear systems arising from the Helmholtz equation. These are often difficult linear systems to solve by iterative methods. 4. We have also worked on purely theoretical issues related to the analysis of Krylov subspace methods for linear systems. 5. We developed an effective strategy for performing ILU factorizations for the case when the matrix is highly indefinite. The strategy uses shifting in some optimal way. The method was extended to the solution of Helmholtz equations by using complex shifts, yielding very good results in many cases. 6. We addressed the difficult problem of preconditioning sparse systems of equations on GPUs. 7. A by-product of the above work is a software package consisting of an iterative solver library for GPUs based on CUDA. This was made publicly available. It was the first such library that offers complete iterative solvers for GPUs. 8. We considered another form of ILU which blends coarsening techniques from Multigrid with algebraic multilevel methods. 9. We have released a new version on our parallel solver - called pARMS [new version is version 3]. As part of this we have tested the code in complex settings - including the solution of Maxwell and Helmholtz equations and for a problem of crystal growth.10. As an application of polynomial preconditioning we considered the problem of evaluating f(A)v which arises in statistical sampling. 11. As an application to the methods we developed, we tackled the problem of computing the diagonal of the inverse of a matrix. This arises in statistical applications as well as in many applications in physics. We explored probing methods as well as domain-decomposition type methods. 12. A collaboration with researchers from Toulouse, France, considered the important problem of computing the Schur complement in a domain-decomposition approach. 13. We explored new ways of preconditioning linear systems, based on low-rank approximations.

Saad, Yousef

2014-01-16T23:59:59.000Z

314

Alpha Heating in ITER L-mode and H-mode Plasma  

SciTech Connect (OSTI)

There are many uses of predictions of ITER plasma performance. One is assessing requirements of different plasma regimes. For instance, what current drive and control are needed for steady state. The heating, current drive, and torque systems planned for initial DT operation are negative ion neutral beam injection (NB), ion cyclotron resonance (IC), and electron cyclotron resonance (EC). Which combinations of heating are optimal. What are benefits of the torques, current drive, and fueling using NB. What are the shine-through power and optimum voltage for the NB? What are optimal locations and aiming of the EC launchers? Another application is nuclear licensing (e.g. System integrity, how many neutrons).

R.V. Budny

2011-07-18T23:59:59.000Z

315

Cryogenic Properties of Inorganic Insulation Materials for ITER Magnets: A Review  

SciTech Connect (OSTI)

Results of a literature search on the cryogenic properties of candidate inorganic insulators for the ITER TF magnets are reported. The materials investigated include: Al{sub 2}O{sub 3}, AlN, MgO, porcelain, SiO{sub 2}, MgAl{sub 2}O{sub 4}, ZrO{sub 2}, and mica. A graphical presentation is given of mechanical, elastic, electrical, and thermal properties between 4 and 300 K. A companion report reviews the low temperature irradiation resistance of these materials.

Simon, N.J.

1994-12-01T23:59:59.000Z

316

Concept development for the ITER equatorial port visible/infrared wide angle viewing system  

SciTech Connect (OSTI)

The ITER equatorial port visible/infrared wide angle viewing system concept is developed from the measurement requirements. The proposed solution situates 4 viewing systems in the equatorial ports 3, 9, 12, and 17 with 4 views each (looking at the upper target, the inner divertor, and tangentially left and right). This gives sufficient coverage. The spatial resolution of the divertor system is 2 times higher than the other views. For compensation of vacuum-vessel movements, an optical hinge concept is proposed. Compactness and low neutron streaming is achieved by orienting port plug doglegs horizontally. Calibration methods, risks, and R and D topics are outlined.

Reichle, R.; Beaumont, B.; Boilson, D.; Bouhamou, R.; Direz, M.-F.; Encheva, A.; Henderson, M.; Kazarian, F.; Lamalle, Ph.; Lisgo, S.; Mitteau, R.; Patel, K. M.; Pitcher, C. S.; Pitts, R. A.; Prakash, A.; Raffray, R.; Schunke, B.; Snipes, J.; Diaz, A. Suarez; Udintsev, V. S. [ITER Organization, Route de Vinon-sur-Verdon, 13115 St Paul-lez-Durance (France); and others

2012-10-15T23:59:59.000Z

317

The ITER-FEAT power supply system and interface with the site HV power grid  

Science Journals Connector (OSTI)

The paper deals with the coil power supplies for ITER-FEAT and focuses on the topics related to their interface with the HV grid, which provides the required pulsed electric power. The availability of a suitable HV grid is assumed. The technical solutions addressed to the limitation of the reactive power consumption are described along with the means for reactive power compensation and active power shedding. The adaptation of the power supply reference design to a site supplied by a HV grid, with capabilities lower than the site assumptions, is discussed.

A. Roshal; B. Bareyt; I. Benfatto; N. Britousov; D. Hrabal; K. Krueger; A. Maschio; P.L. Mondino; T. Shoji

2001-01-01T23:59:59.000Z

318

Choice, involvement and illusory control 1 Running head: CHOICE, INVOLVEMENT AND ILLUSORY CONTROL  

E-Print Network [OSTI]

, which triggers the (quasi-)immediate resolution of the gamble (e.g., spinning the wheel, throwing the dice, picking the ball from the urn).1 Choice and Involvement are orthogonal dimensions of the gambling

Boyer, Edmond

319

Alcator C-Mod Experiments in Support of the ITER Baseline 15 MA Scenario  

SciTech Connect (OSTI)

Experiments on Alcator C-Mod have addressed several issues for the ITER 15 MA baseline scenario from 2009-2012. Rampup studies show ICRF can save significant V-s, and that an H-mode in the ramp can be utilized to save 50% more. ICRF modifications to li(1) are minimal, although the Te profile is peaked relative to ohmic in the plasma center, and alter sawtooth onset times. Rampdown studies show H-modes can be routinely sustained, avoiding an OH coil over-current associated with the H-L transition, that fast rampdowns are preferred, the density drops with Ip, and that the H-L transition occurs at Ploss/Pthr,LH ~ 1.0-1.3 at n/nGr ~ 0.85. Flattop plasmas targeting ITER baseline parameters have been sustained for 20 ?E or 8-13 ?CR, but only reach H98 ~ 0.6 at n/nGr = 0.85, rising to 0.9 at n/nGr = 0.65.

C Kessel, et al

2013-05-07T23:59:59.000Z

320

Investigation and analysis on ITER in-vessel coils’ raw-materials  

Science Journals Connector (OSTI)

Abstract The ITER in-vessel coils (IVCs) consist of 27 coils edge localized modes (ELM) and 2 coils vertical stabilization (VS) which are all mounted on the vacuum vessel wall behind the shield modules. The \\{IVCs\\} design and manufacturing work is being conducted in between Institute of Plasma Physics Chinese Academy of Sciences (ASIPP) and Princeton Plasma Physics Laboratory (PPPL). Because the position of ELM and VS coils is close and face to the plasma, the \\{IVCs\\} must undergo a severe environment, such as the high dose of radiation and high operation temperature, thus the conventional electrical insulation materials cannot be used. And the technology of “Stainless Steel Jacketed Mineral Insulated Conductor” (SSMIC) is deemed as the best choice to provide the necessary radiation resistance and compatibility strength in ITER's vacuum vessel. While mineral insulated conductor technology is not new, and is similar to the mineral insulated cable used in industrial. Some difficulties still need to be solved, such as searching for the proper raw-materials to make sure that the conductor have the properties of high current carrying capability, the necessary radiation resistance, the proper strength, at the same time, it must be come true in manufacture technology. This paper described the analysis of the materials for VS and ELM coil conductor.

Huan Jin; Yu Wu; Feng Long; Min Yu; Qiyang Han; Huajun Liu

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Beryllium fabrication/cost assessment for ITER (International Thermonuclear Experimental Reactor)  

SciTech Connect (OSTI)

A fabrication and cost estimate of three possible beryllium shapes for the International Thermonuclear Experimental Reactor (ITER) blanket is presented. The fabrication method by hot pressing (HP), cold isostatic pressing plus sintering (CIP+S), cold isostatic pressing plus sintering plus hot isostatic pressing (CIP+S+HIP), and sphere production by atomization or rotary electrode will be discussed. Conventional hot pressing blocks of beryllium with subsequent machining to finished shapes can be more expensive than production of a net shape by cold isostatic pressing and sintering. The three beryllium shapes to be considered here and proposed for ITER are: (1) cubic blocks (3 to 17 cm on an edge), (2) tubular cylinders (33 to 50 mm i.d. by 62 mm o.d. by 8 m long), and (3) spheres (1--5 mm dia.). A rough cost estimate of the basic shape is presented which would need to be refined if the surface finish and tolerances required are better than the sintering process produces. The final cost of the beryllium in the blanket will depend largely on the machining and recycling of beryllium required to produce the finished product. The powder preparation will be discussed before shape fabrication. 10 refs., 6 figs.

Beeston, J.M. (Beeston (J.M.), Garrison, UT (USA)); Longhurst, G.R. (EG and G Idaho, Inc., Idaho Falls, ID (USA)); Parsonage, T. (Brush Wellman, Inc., Elmore, OH (USA))

1990-06-01T23:59:59.000Z

322

Comparison and Analysis of Twist Pitch Length Test Methods for ITER Nb3Sn and NbTi Strands  

E-Print Network [OSTI]

A twisted multifilamentary structure is needed for Nb3Sn and NbTi strands to be used in the International Thermonuclear Experimental Reactor (ITER) magnets. As important parameters for the superconducting strands design and production, the twist pitch length and direction of strands must meet the requirements according to ITER Procurement Arrangement (PA) and this must be verified. The technical requirements are 15mm+/-2mm for twist pitch length and right hand twist for direction. The strand twist pitch and the twist direction can be measured on straight sections of strand, which is recognized by the repetition of filament bundles or by the angle of the filaments. Several test methods and results are described and compared in this paper. The accuracy, uncertainty and feasibility of different methods are analyzed and recommended measurement methods are proposed for ITER strands verification.

Fang Liu; Feng Long; Chao Chen; Bo Liu; Yu Wu; Huajun Liu

2013-05-08T23:59:59.000Z

323

Modeling  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

a single-fluid diffuse interface model in the ALE-AMR hydrodynamics code to simulate surface tension effects. We show simula- tions and compare them to other surface tension...

324

Modeling  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

sion effects. We show the result of a test case, and compare it to the result without surface tension. The model describes droplet formation nicely. Application The ARRA-funded...

325

ITER: Japanese and Europeans still at a Dead End 23/03 13:14 Japan and the European Commission completed Tuesday in Tokyo of the bilateral  

E-Print Network [OSTI]

Mitsos. The European delegation had talks on Friday with Japanese specialists in nuclear power and energyITER: Japanese and Europeans still at a Dead End 23/03 13:14 Japan and the European Commission of nuclear fusion ITER without managing to leave the dead end, but making the report of a necessary

326

Modeling  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ALE-AMR ALE-AMR code Wangyi Liu, John Bernard, Alex Friedman, Nathan Masters, Aaron Fisher, Velemir Mlaker, Alice Koniges, David Eder June 4, 2011 Abstract In this paper we describe an implementation of a single-fluid inter- face model in the ALE-AMR code to simulate surface tension effects. The model does not require explicit information on the physical state of the two phases. The only change to the existing fluid equations is an additional term in the stress tensor. We show results of applying the model to an expanding Al droplet surrounded by an Al vapor, where additional droplets are created. 1 Introduction The Neutralized Drift Compression Experiment II (NDCX II) is an induction accelerator planned for initial commissioning in 2012. The final design calls for a 3 MeV, Li+ ion beam, delivered in a bunch with characteristic pulse duration of 1 ns, and transverse dimension of order 1 mm. The

327

A successful effort to involve stakeholders in a facility siting decision using LIPS with stakeholder involvement  

SciTech Connect (OSTI)

Local public opposition to federal bureaucratic decisions has resulted in public agencies rethinking the role of stakeholders in decision making. Efforts to include stakeholders directly in the decision-making process are on the increase. Unfortunately, many attempts to involve members of the public in decisions involving complex technical issues have failed. A key problem has been defining a meaningful role for the public in the process of arriving at a technical decision. This paper describes a successful effort by Sandia National Laboratories (SNL) in New Mexico to involve stakeholders in an important technical decision associated with its Environmental Restoration (ER) Project. The decision was where to locate a Corrective Action Management Unit (CAMU), a facility intended to consolidate and store wastes generated from the cleanup of hazardous waste sites. A formal priority setting process known as the Laboratory Integration Prioritization System (LIPS) was adapted to provide an approach for involving the public. Although rarely applied to stakeholder participation, the LIPS process proved surprisingly effective. It produced a consensus over a selected site and enhanced public trust and understanding of Project activities.

Merkhofer, L. [Applied Decision Analysis, Inc., Menlo Park, CA (United States); Conway, R. [Sandia National Labs., Albuquerque, NM (United States); Anderson, B. [Los Alamos National Lab., NM (United States)

1995-12-31T23:59:59.000Z

328

ThreeThree--dimensional magnetic fielddimensional magnetic field line reconnection involving fluxline reconnection involving flux  

E-Print Network [OSTI]

ThreeThree--dimensional magnetic fielddimensional magnetic field line reconnection involving helicity) · Relaxation of complex field geometries into simpler ones · Magnetic Field Line Reconnection (2D ~ . magnetic field is measured at 20,000 locations #12;Hodogram of central field line in flux tubes

Shyy, Wei

329

Upgrade of the infrared camera diagnostics for the JET ITER-like wall divertor  

SciTech Connect (OSTI)

For the new ITER-like wall at JET, two new infrared diagnostics (KL9B, KL3B) have been installed. These diagnostics can operate between 3.5 and 5 {mu}m and up to sampling frequencies of {approx}20 kHz. KL9B and KL3B image the horizontal and vertical tiles of the divertor. The divertor tiles are tungsten coated carbon fiber composite except the central tile which is bulk tungsten and consists of lamella segments. The thermal emission between lamellae affects the surface temperature measurement and therefore KL9A has been upgraded to achieve a higher spatial resolution (by a factor of 2). A technical description of KL9A, KL9B, and KL3B and cross correlation with a near infrared camera and a two-color pyrometer is presented.

Balboa, I.; Arnoux, G.; Kinna, D.; Thomas, P. D. [EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, OX14 3DB (United Kingdom); Eich, T.; Sieglin, B.; Devaux, S.; Zeidner, W. [Max-Planck-IPP, EURATOM Association, D-85748 Garching (Germany); Morlock, C.; Kruezi, U.; Sergienko, G.; Rack, M. [Institut fuer Energie und Klimaforschung Plasmaphysik, Forschungszentrum Juelich GmbH, EURATOM Association FZJ, D-52425 Juelich (Germany); Collaboration: JET EFDA Contributors

2012-10-15T23:59:59.000Z

330

Iterative methods for solving space-time one dimensional multigroup diffusion equations  

Science Journals Connector (OSTI)

The numerical methods of Successive Overrelaxation (SOR), Successive-Line Overrelaxation (SLOR) and Alternating Direction Implicit (ADI) are used in this research to solve space-time one-dimensional diffusion equations. The results of this research have been compared with the ANL-Benchmark Problem BSS-6-A2. In general, the results are in agreement with the Argonne National Laboratory Benchmark Source Situation (BSS-6-A2). However, there is very little difference between SOR and ANL-BSS-6-A2 because of inner iterations in the SOR method. This research shows that the SLOR and ADI methods are more accurate and more efficient than the SOR method in solving space-time diffusion equations. SLOR is the most efficient in the case of a big number of mesh elements; however, the ADI method is the most efficient in the case of a small number of mesh elements.

Y. Yulianti; Z. Su'ud; A. Waris; S.N. Khotimah

2010-01-01T23:59:59.000Z

331

Nuclear analysis and shielding optimisation in support of the ITER In-Vessel Viewing System design  

E-Print Network [OSTI]

The In-Vessel Viewing System (IVVS) units proposed for ITER are deployed to perform in-vessel examination. During plasma operations, the IVVS is located beyond the vacuum vessel, with shielding blocks envisaged to protect components from neutron damage and reduce shutdown dose rate (SDR) levels. Analyses were conducted to determine the effectiveness of several shielding configurations. The neutron response of the system was assessed using global variance reduction techniques and a surface source, and shutdown dose rate calculations were undertaken using MCR2S. Unshielded, the absorbed dose to piezoelectric motors (PZT) was found to be below stable limits, however activation of the primary closure plate (PCP) was prohibitively high. A scenario with shielding blocks at probe level showed significantly reduced PCP contact dose rate, however still marginally exceeded port cell requirements. The addition of shielding blocks at the bioshield plug demonstrated PCP contact dose rates below project requirements. SDR l...

Turner, A; Loughlin, M J; Ghani, Z; Hurst, G; Bue, A Lo; Mangham, S; Puiu, A; Zheng, S

2014-01-01T23:59:59.000Z

332

Design Analysis and Manufacturing Studies for ITER In-Vessel Coils  

SciTech Connect (OSTI)

ITER is incorporating two types of In Vessel Coils (IVCs): ELM Coils to mitigate Edge Localized Modes and VS Coils to provide Vertical Stabilization of the plasma. Strong coupling with the plasma is required so that the ELM and VS Coils can meet their performance requirements. Accordingly, the IVCs are in close proximity to the plasma, mounted just behind the Blanket Shield Modules. This location results in a radiation and temperature environment that is severe necessitating new solutions for material selection as well as challenging analysis and design solutions. Fitting the coil systems in between the blanket shield modules and the vacuum vessel leads to difficult integration with diagnostic cabling and cooling water manifolds.

Kalish, M.; Heitzenroeder, P.; Neumeyer, C.; Titus, P.; Zhai, Y.; Zatz, I.; Messineo, M.; Gomez, M.; Hause, C. [Princeton Plasma Physics Lab., Princeton, NJ (United States); Daly, E.; Martin, A. [ITER Organization, St. Paul-lez-Duranace (France); Wu, Y.; Jin, J.; Long, F.; Song, Y.; Wang, Z.; Yun, Zan [Chinese Academy of Sciences, Anhui (China). Institute of Plasma Physics; Hsiao, J. [Vector Resources, Annandale, VA (United States); Pillsbury, J. R. [Sherbrooke Consulting, Arlington, VA (United States); Bohm, T.; Sawan, M. [Univ. of Wisconsin-Madison, WI (United States). Fustion Technology Institute; Jiang, NFN [Southwestern Institute of Physics, Chengdu (China)

2014-07-01T23:59:59.000Z

333

Progress toward a microsecond duration, repetitive, intense-ion beam for active spectroscopic measurements on ITER  

SciTech Connect (OSTI)

The authors describe the design of an intense, pulsed, repetitive, neutral beam based on magnetically insulated diode technology for injection into ITER for spectroscopic measurements of thermalizing alpha particle and thermal helium density profiles, ion temperature, plasma rotation, and low Z impurity concentrations in the confinement region. The beam is being developed to enhance low signal-to-noise ratios expected with conventional steady-state ion beams because of severe beam attenuation and intense bremstrahlung emission. A 5 GW (e.g., 100 keV, 50 kA) one-microsecond-duration beam would increase the signal by 10{sup 3} compared to a conventional 5 MW beam with signal-to-noise ratios comparable to those from a chopped conventional beam in one second.

Davis, H.A.; Bartsch, R.R.; Barnes, C.W. [and others

1996-06-01T23:59:59.000Z

334

Comparison of Nb/sub 3/Sn and NbTi superconductor magnet ITER devices  

SciTech Connect (OSTI)

The TETRA tokamak systems code is used to compare designs for the International Thermonuclear Experimental Reactor (ITER) that use Nb/sub 3/Sn and NbTi superconductor magnets. Similar minimum-cost devices are found with both types of conductors when superfluid helium (He-II) is used in conjunction with the NbTi. The cost of using NbTi with He-I cooling is much higher than that of using Nb/sub 3/Sn or NbTi with He-II cooling. Generally, the minimum-cost devices occur for peak fields at the toroidal field coil of about 11.5 - 13 T, depending on the physics requirements. Sensitivities to the allowable stress level indicate strong cost increases when the stress is reduced from the nominal 600-MPa level and weaker cost benefits when the stress is allowed to reach higher levels.

Galambos, J.D.; Peng, Y.K.M.; Reid, R.L.; Lubell, M.S.; Dresner, L.; Miller, J.R.

1989-03-01T23:59:59.000Z

335

Implementation of Iterative Map turbo Decoder on TMS320C40 DSP  

E-Print Network [OSTI]

. ENDM MAIN PROGRAM STORED AT ERAM BANK2 . TEXT MAIN GAM TMP ADR; LOAD PAGE POINTER IOSTACK PTR, SP ; LOAD STACK POINTER OCQNSTi, Rii; STORE CQNSTi IN Rii LDP LDI LDF LDI O, RO BIGGER LOOP: STI RO, OBIG ITER LDI O, RO INITIALIZE MEMORY... LDF ttAR2(IRO), RO, R1 Ri, R2 tAR3tt, IRO tARO, RO LDF MPYF3 ttAR2(IRO), RO, R1 D1 LOOP9: ADDF ADDI 16, AR2 RCPF R2, R1 MPYF3 Ri, R3, RO LOG2 MPYF3 Rii, RO, R1 STF Ri, tAR4tt LDI @STATE SIZE, RC RPTBD LOOP9 LDA %PRE ST ADR, AR3 LDF O...

Patil, Sunil S

2012-06-07T23:59:59.000Z

336

Progress of the ITER equatorial vis/IR wide angle viewing system optical design  

SciTech Connect (OSTI)

The equatorial vis/IR wide angle viewing system is present in four ITER diagnostic equatorial ports. This instrument will cover a large field of view with high spatial and temporal resolutions, to provide real time temperature measurements of plasma facing components, spectral data in the visible range, information on runaway electrons, and pellet tracking. This diagnostic needs to be reliable, precise, and long lasting. Its design is driven by both the tokamak severe environment and the high performances required for machine protection. The preliminary design phase is ongoing. Paramount issues are being tackled, relative to wide spectral band optical design, material choice, and optomechanical difficulties due to the limited space available for this instrument in the ports, since many other diagnostics and services are also present. Recent progress of the diagnostic optical design and status of associated R and D are presented.

Davi, M.; Corre, Y.; Guilhem, D.; Jullien, F.; Reichle, R.; Salasca, S.; Travere, J. M. [Association Euratom CEA, CEA/DSM/IRFM, Cadarache, 13108 Saint-Paul-lez-Durance (France); Cal, E. de la; Manzanares, A.; Pablos, J. L. de [Association Euratom CIEMAT, Av. Complutense 22, 28040 Madrid (Spain); Migozzi, J. B. [JBM Optique, 11 Av. de la division Leclerc, 92310 Sevres (France)

2008-10-15T23:59:59.000Z

337

SUMBMISSION TO TPAMI: OOI EXTRACTION BY LOCAL-GLOBAL ENERGY MINIMIZATION 1 Iterative local-global energy minimization for  

E-Print Network [OSTI]

SUMBMISSION TO TPAMI: OOI EXTRACTION BY LOCAL-GLOBAL ENERGY MINIMIZATION 1 Iterative local-global energy minimization for automatic extraction of object of interest Gang Hua, Member, IEEE, Zicheng Liu are with the Department of Electrical Engineering and Computer Science, Northwest- ern University, 2145 Sheridan Road

Wu, Ying

338

ITER pioneers receive prestigious Russian energy prize of June in Saint Petersburg, three pioneers of the international fusion project  

E-Print Network [OSTI]

Vladimir Putin, president of the Russian Federation. The laureates -- the Russian academician Evgeniy speech during the prize ceremony, President Putin said: "I will emphasize that as one of the world Putin in Saint Petersburg earlier today. Evgeniy Velikhov is one of the founders of the ITER project

339

An optimization technique on pseudorandom generators based on chaotic iterations Jacques M. Bahi, Xiaole Fang, and Christophe Guyeux*  

E-Print Network [OSTI]

-Comt´e, Besanc¸on, France Email:{jacques.bahi, xiaole.fang, christophe.guyeux}@univ-fcomte.fr Abstract--Internet in the previous International Conference on Evolving Internet (Internet 09, 10, and 11), three methods to build tests decrease when the power of chaotic iterations increase. Keywords-Internet security; Pseudorandom

Boyer, Edmond

340

IAEA FEC Saint Petersburg, Russia, 13-18 October 2014, O. Motojima The ITER Project Construction Status  

E-Print Network [OSTI]

IAEA FEC Saint Petersburg, Russia, 13-18 October 2014, O. Motojima Slide 1/14 OM14755 The ITER Project Construction Status IAEA FEC 13 to 18 October, 2014 Saint Petersburg, Russia Osamu Motojima President Barroso (11 July 2014) #12;IAEA FEC Saint Petersburg, Russia, 13-18 October 2014, O. Motojima

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341

Absolute x-ray energy calibration over a wide energy range using a diffraction-based iterative method  

E-Print Network [OSTI]

Mineral Physics Institute, Stony Brook University, Stony Brook, New York 11794, USA 2 DepartmentAbsolute x-ray energy calibration over a wide energy range using a diffraction-based iterative;REVIEW OF SCIENTIFIC INSTRUMENTS 83, 063901 (2012) Absolute x-ray energy calibration over a wide energy

Duffy, Thomas S.

342

Exhibit 1B Patent Rights Acquisition by the Government ITER UT-B Contracts Div Page 1 of 6  

E-Print Network [OSTI]

of Energy patent waiver regulations at 10 CFR Part 784. (6) "Agency licensing regulations" and "applicable regulations at 10 CFR Part 781. (7) "Member" means members of the ITER Organization who are parties Organization composed of Representatives of the Members and as described in Article 6 of the Agreement. (10

Pennycook, Steve

343

White Paper for Developing Electromagnetic Particle Injector system for ITER on NSTX-U University of Washington (19 July 2012)  

E-Print Network [OSTI]

White Paper for Developing Electromagnetic Particle Injector system for ITER on NSTX-U University of Washington (19 July 2012) 1/2 White Paper@aa.washington.edu This white paper describes our plans for developing a new system for safely

344

2 Dynamic analysis of mixed ion beams/materials effects on the performance 3 of ITER-like devices  

E-Print Network [OSTI]

1 2 Dynamic analysis of mixed ion beams/materials effects on the performance 3 of ITER-like devices 4 Tatyana Sizyuk ,1 , Ahmed Hassanein 5 School of Nuclear Engineering, Center for Materials undersimultaneous ion penetration and mixing, scattering, reflection, physical and chemical sputtering, 20dynamic

Harilal, S. S.

345

PUBLISHED VERSION Effect of the minority concentration on ion cyclotron resonance heating in presence of the ITER-  

E-Print Network [OSTI]

PUBLISHED VERSION Effect of the minority concentration on ion cyclotron resonance heating.1063/1.4864528 #12;Effect of the minority concentration on ion cyclotron resonance heating in presence of the ITER, 17 Feb 2014 11:52:30 #12;Effect of the minority concentration on ion cyclotron resonance heating

346

DQS Advisor: A visual interface and knowledge-based system to balance dose, quality, and reconstruction speed in iterative  

E-Print Network [OSTI]

the limited projection data collected at reduced X-ray radiation is challenging, and iterative algorithms have concerns with regards to the X-ray dose delivered to the patient, low-dose Computed Tomography (CT) has and K Mueller Visual Analytic and Imaging Lab, Computer Science Department, Stony Brook University, NY

Mueller, Klaus

347

Background and radiation resistance tests of neutral particle analyzer detectors for ITER by using a fast neutron beam  

SciTech Connect (OSTI)

The radiation resistance and background sensitivity of scintillation (Hamamatsu H8500D photo-multiplier) and semiconductor (ORTEC BF-018-100-60 and BU-012-050-100) detectors to neutron and gamma radiation were investigated. Conclusions are drawn concerning the possibility of using such detectors in neutral particle analyzers that are being developed for ITER at the Ioffe Institute.

Afanasyev, V. I. [Russian Academy of Sciences, Ioffe Physical-Technical Institute (Russian Federation); Kozlovskii, S. S.; Makar'in, D. V. [St. Petersburg State Polytechnical University (Russian Federation); Mel'nik, A. D.; Mironov, M. I.; Nesenevich, V. G.; Petrov, M. P.; Petrov, S. Ya.; Chernyshev, F. V. [Russian Academy of Sciences, Ioffe Physical-Technical Institute (Russian Federation)

2010-05-15T23:59:59.000Z

348

A collaboration opportunity for next step tokamaks: ITER and DEMO (specifically a next generation diagnostic: the pulsed polarimetry technique)  

E-Print Network [OSTI]

A collaboration opportunity for next step tokamaks: ITER and DEMO (specifically a next generation and developing diagnostic technique and propose it to the FESAC International Collaboration Panel as a topic for collaborative international research. The diagnostic is a remote sensing technique with potential for measuring

349

Iterative Informed Audio Data Hiding Scheme Using Optimal Filter Alejandro LoboGuerrero, Patrick Bas, Jol Linard  

E-Print Network [OSTI]

Iterative Informed Audio Data Hiding Scheme Using Optimal Filter Alejandro LoboGuerrero, Patrick.bas@lis.inpg.fr,joel.lienard@lis.inpg.fr Abstract- Audio watermarking is a method that allows the insertion of an imperceptible mark on an audio, the audio data set represents the host that supports the embedded information and it is considered as "noise

Paris-Sud XI, Université de

350

Japan considers conceding ITER site to France TOKYO, May 4, Kyodo -(EDS: UPDATING WITH MACHIMURA MEETING WITH BARNIER IN  

E-Print Network [OSTI]

Japan considers conceding ITER site to France TOKYO, May 4, Kyodo - (EDS: UPDATING WITH MACHIMURA MEETING WITH BARNIER IN 5TH GRAF, EU RESPONSE IN 6TH GRAF) Japan is considering giving up its bid to build Wednesday. The ballooning construction cost burden amid stalled negotiations has prompted Japan to consider

351

Evaluation of Static Mixer Flow Enhancements for Cryogenic Viscous Compressor Prototype for ITER Vacuum System  

SciTech Connect (OSTI)

As part of the U.S. ITER contribution to the vacuum systems for the ITER fusion project, a cryogenic viscous compressor (CVC) is being designed and fabricated to cryopump hydrogenic gases in the torus and neutral beam exhaust streams and to regenerate the collected gases to controlled pressures such that they can be mechanically pumped with controlled flows to the tritium reprocessing facility. One critical element of the CVC design that required additional investigation was the determination of flow rates of the low pressure (50 to 1000 Pa) exhaust stream that would allow for complete pumping of hydrogenic gases while permitting trace levels of helium to pass through the CVC to be pumped by conventional vacuum pumps. A sub-scale prototype test facility was utilized to determine the effectiveness of a static mixer pump tube concept, which consisted of a series of rotated twisted elements brazed into a 2-mm thick, 5-cm diameter stainless steel tube. Cold helium gas flow provided by a dewar and helium transfer line was used to cool the exterior of the static mixer pump tube. Deuterium gas was mixed with helium gas through flow controllers at different concentrations while the composition of the exhaust gas was monitored with a Penning gauge and optical spectrometer to determine the effectiveness of the static mixer. It was found that with tube wall temperatures between 6 K and 9 K, the deuterium gas was completely cryopumped and only helium passed through the tube. These results have been used to design the cooling geometry and the static mixer pump tubes in the full-scale CVC prototype

Duckworth, Robert C [ORNL] [ORNL; Baylor, Larry R [ORNL] [ORNL; Meitner, Steven J [ORNL] [ORNL; Combs, Stephen Kirk [ORNL] [ORNL; Ha, Tam T [ORNL] [ORNL; Morrow, Michael [ORNL] [ORNL; Biewer, Theodore M [ORNL] [ORNL; Rasmussen, David A [ORNL] [ORNL; Hechler, Michael P [ORNL] [ORNL; Pearce, R.J.H. [ITER Organization, Cadarache, France] [ITER Organization, Cadarache, France; Dremel, M. [ITER Organization, Cadarache, France] [ITER Organization, Cadarache, France; Boissin, Jean Claude [Consultant] [Consultant

2014-01-01T23:59:59.000Z

352

Evaluation of static mixer flow enhancements for cryogenic viscous compressor prototype for ITER vacuum system  

SciTech Connect (OSTI)

As part of the U.S. ITER contribution to the vacuum systems for the ITER fusion project, a cryogenic viscous compressor (CVC) is being designed and fabricated to cryopump hydrogenic gases in the torus and neutral beam exhaust streams and to regenerate the collected gases to controlled pressures such that they can be mechanically pumped with controlled flows to the tritium reprocessing facility. One critical element of the CVC design that required additional investigation was the determination of flow rates of the low pressure (up to 1000 Pa) exhaust stream that would allow for complete pumping of hydrogenic gases while permitting trace levels of helium to pass through the CVC to be pumped by conventional vacuum pumps. A sub-scale prototype test facility was utilized to determine the effectiveness of a static mixer pump tube concept, which consisted of a series of rotated twisted elements brazed into a 2-mm thick, 5-cm diameter stainless steel tube. Cold helium gas flow provided by a dewar and helium transfer line was used to cool the exterior of the static mixer pump tube. Deuterium gas was mixed with helium gas through flow controllers at different concentrations while the composition of the exhaust gas was monitored with a Penning gauge and optical spectrometer to determine the effectiveness of the static mixer. It was found that with tube wall temperatures between 6 K and 9 K, the deuterium gas was completely cryopumped and only helium passed through the tube. These results have been used to design the cooling geometry and the static mixer pump tubes in the full-scale CVC prototype.

Duckworth, Robert C.; Baylor, Larry R.; Meitner, Steven J.; Combs, Stephen K.; Ha, Tam; Morrow, Michael; Biewer, T. [Fusion and Materials for Nuclear System Division, Oak Ridge National Laboratory, Oak Ridge (United States); Rasmussen, David A.; Hechler, Michael P. [U.S. ITER Project Office, Oak Ridge National Laboratory, Oak Ridge (United States); Pearce, Robert J. H.; Dremel, Mattias [ITER Organization, 13115 St. Paul-lez-Durance (France); Boissin, J.-C. [Consultant, Grenoble (France)

2014-01-29T23:59:59.000Z

353

Mathematical models of the VEGF receptor and its role in cancer therapy  

Science Journals Connector (OSTI)

...different processes. One way...relaxation process being faster...obtained using Matlab's stiff...We have run simulations of anti-VEGF...performing simulations of the stochastic...solved in Matlab using an iterative...angiogenic process and, therefore...involving chemical reaction-like...

2007-01-01T23:59:59.000Z

354

Public involvement in radioactive waste management decisions  

SciTech Connect (OSTI)

Current repository siting efforts focus on Yucca Mountain, Nevada, where DOE`s Office of Civilian Radioactive Waste Management (OCRWM) is conducting exploratory studies to determine if the site is suitable. The state of Nevada has resisted these efforts: it has denied permits, brought suit against DOE, and publicly denounced the federal government`s decision to study Yucca Mountain. The state`s opposition reflects public opinion in Nevada, and has considerably slowed DOE`s progress in studying the site. The Yucca Mountain controversy demonstrates the importance of understanding public attitudes and their potential influence as DOE develops a program to manage radioactive waste. The strength and nature of Nevada`s opposition -- its ability to thwart if not outright derail DOE`s activities -- indicate a need to develop alternative methods for making decisions that affect the public. This report analyzes public participation as a key component of this openness, one that provides a means of garnering acceptance of, or reducing public opposition to, DOE`s radioactive waste management activities, including facility siting and transportation. The first section, Public Perceptions: Attitudes, Trust, and Theory, reviews the risk-perception literature to identify how the public perceives the risks associated with radioactivity. DOE and the Public discusses DOE`s low level of credibility among the general public as the product, in part, of the department`s past actions. This section looks at the three components of the radioactive waste management program -- disposal, storage, and transportation -- and the different ways DOE has approached the problem of public confidence in each case. Midwestern Radioactive Waste Management Histories focuses on selected Midwestern facility-siting and transportation activities involving radioactive materials.

NONE

1994-04-01T23:59:59.000Z

355

Building Technologies Office: Get Involved with Home Energy Score  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Get Involved with Home Get Involved with Home Energy Score to someone by E-mail Share Building Technologies Office: Get Involved with Home Energy Score on Facebook Tweet about Building Technologies Office: Get Involved with Home Energy Score on Twitter Bookmark Building Technologies Office: Get Involved with Home Energy Score on Google Bookmark Building Technologies Office: Get Involved with Home Energy Score on Delicious Rank Building Technologies Office: Get Involved with Home Energy Score on Digg Find More places to share Building Technologies Office: Get Involved with Home Energy Score on AddThis.com... About Take Action to Save Energy Partner With DOE Activities Solar Decathlon Building America Home Energy Score Get Involved Partners Research & Background FAQs Home Performance with ENERGY STAR

356

EMERGENCY RESPONSE TO A TRANSPORTATION ACCIDENT INVOLVING RADIOACTIVE MATERIAL  

Broader source: Energy.gov (indexed) [DOE]

Emer Emer Emer Emer Emer Emergency Response to a T gency Response to a T gency Response to a T gency Response to a T gency Response to a Transportation ransportation ransportation ransportation ransportation Accident Involving Radioactive Material Accident Involving Radioactive Material Accident Involving Radioactive Material Accident Involving Radioactive Material Accident Involving Radioactive Material DISCLAIMER DISCLAIMER DISCLAIMER DISCLAIMER DISCLAIMER Viewing this video and completing the enclosed printed study material do not by themselves provide sufficient skills to safely engage in or perform duties related to emergency response to a transportation accident involving radioactive material. Meeting that goal is beyond the scope of this video and requires either additional

357

Multibody Models for Vehicle Accident Reconstruction  

Science Journals Connector (OSTI)

Simplified multibody models can be used to reconstruct accidents involving complex dynamics, particularly, in the first stages of accident investigation, accidents involving motorcycles and pedestrians [1], [2].

Ricardo J. F. Portal; Joăo M. P. Dias

2006-01-01T23:59:59.000Z

358

Building Technologies Program: How Do I Get Involved?  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

How Do I Get Involved? How Do I Get Involved? to someone by E-mail Share Building Technologies Program: How Do I Get Involved? on Facebook Tweet about Building Technologies Program: How Do I Get Involved? on Twitter Bookmark Building Technologies Program: How Do I Get Involved? on Google Bookmark Building Technologies Program: How Do I Get Involved? on Delicious Rank Building Technologies Program: How Do I Get Involved? on Digg Find More places to share Building Technologies Program: How Do I Get Involved? on AddThis.com... About Laws & Regulations ENERGY STAR® Testing & Verification EPACT 2005 Test Procedures Information Resources Notices & Rules Certification & Enforcement Schedule Setting Public Workshops & Hearings State Petitions Useful Links Guidance & FAQs

359

Hydrogen Bonds Involved in Binding the Qi-site Semiquinone in the bc1 Complex, Identified through Deuterium Exchange  

E-Print Network [OSTI]

Hydrogen Bonds Involved in Binding the Qi-site Semiquinone in the bc1 Complex, Identified through them. The strength of interactions indicates that the protons are involved in hydrogen bonds with SQ. The hyperfine cou- plings differ from values typical for in-plane hydrogen bonds previously observed in model

Crofts, Antony R.

360

Safety Issues and Approach to Meet the Safety Requirements in Tokamak Cooling Water System of ITER  

SciTech Connect (OSTI)

The ITER (Latin for 'the way') tokamak cooling water system (TCWS) consists of several separate systems to cool the major ITER components - the divertor/limiter, the first wall blanket, the neutral beam injector and the vacuum vessel. The ex-vessel part of the TCWS systems provides a confinement function for tritium and activated corrosion products in the cooling water. The Vacuum Vessel System also has a functional safety requirement regarding the residual heat removal from in-vessel components. A preliminary hazards assessment (PHA) was performed for a better understanding of the hazards, initiating events, and defense in depth mechanisms associated with the TCWS. The PHA was completed using the following steps. (1) Hazard Identification. Hazards associated with the TCWS were identified including radiological/chemical/electromagnetic hazards and physical hazards (e.g., high voltage, high pressure, high temperature, falling objects). (2) Hazard Categorization. Hazards identified in step (1) were categorized as to their potential for harm to the workers, the public, and/or the environment. (3) Hazard Evaluation. The design was examined to determine initiating events that might occur and that could expose the public, environment, or workers to the hazard. In addition the system was examined to identify barriers that prevent exposure. Finally, consequences to the public or workers were qualitatively assessed, should the initiating event occur and one or more of the barriers fail. Frequency of occurrence of the initiating event and subsequent barrier failure was qualitatively estimated. (4) Accident Analysis. A preliminary hazards analysis was performed on the conceptual design of the TCWS. As the design progresses, a detailed accident analysis will be performed in the form of a failure modes and effects analysis. The results of the PHA indicated that the principal hazards associated with the TCWS were those associated with radiation. These were low compared to hazards associated with nuclear fission reactors and were limited to potential exposure to the on-site workers if appropriate protective actions were not used. However, the risk to the general public off-site was found to be negligible even under worst case accident conditions.

Flanagan, George F [ORNL] [ORNL; Reyes, Susana [ITER Organization, Saint Paul Lez Durance, France] [ITER Organization, Saint Paul Lez Durance, France; Chang, Keun Pack [ITER Organization, Saint Paul Lez Durance, France] [ITER Organization, Saint Paul Lez Durance, France; Berry, Jan [ORNL] [ORNL; Kim, Seokho H [ORNL] [ORNL

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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361

Towards Evolutionary Economic Analysis of Sustainable Urban Real Estate: Concept of a Research Strategy Exemplified on House Price Modeling Using the Self-Organizing Map, Interviews and Field Inspection  

Science Journals Connector (OSTI)

Evolutionary economics has begun to replace—or at least complement—neoclassical economics as the most widely accepted framework for economic modeling. Evolutionary frameworks are nonlinear and iterative: they ...

Tom Kauko

2014-01-01T23:59:59.000Z

362

E-Print Network 3.0 - arms race involving Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

fact, F-Race has... Intelligence Artificielle F-Race and iterated F-Race: An overview Mauro Birattari, Zhi Yuan, Prasanna... that might be made of data appearing in this...

363

MESOMECHANICAL MODELING OF FRACTURE  

Science Journals Connector (OSTI)

This paper reviews the efforts of the author and his colleagues over the past five decades to develop mesomechanical models of material failure. In the early 1970s a procedure known as the NAG/FRAG (Nucleation and Growth to Fragmentation) methodology was introduced by a group at SRI International. Experiments are performed in which the evolution of micro structural damage is measured posttest as a function of stress time?at?stress temperature and other environmental parameters. Damage nucleation and growth functions are deduced via iterative computational simulations. I conclude the review with a discussion of a current challenging problem: that of designing improved glass and ceramic armors.

D. R. Curran

2009-01-01T23:59:59.000Z

364

Influence of the Edge Plasma Profile and Parameters on the Coupling of an ICRH Antenna. Application to ITER  

SciTech Connect (OSTI)

The coupling to the fast wave of an ICRH antenna is principally determined by its distance to an optimum plasma density correlated to the cutoff one and by the density gradient between this optimum density and the bulk plasma. This explains the differences in coupling for the various heating and current drive phasings as predicted for different plasma edge profiles considered for ITER. For a given electron density edge profile the ion mix, the steady magnetic field and the frequency have also a significant effect on the coupling performances. These quantities affect the coupling mainly by influencing the position of the optimum density in the profile. A marked perturbation of the coupling leading to a large edge power deposition can occur when the Alfven resonance lies in the edge profile. The results are applied to different ICRF scenarios considered for ITER at full and half toroidal field.

Messiaen, A.; Koch, R.; Weynants, R. [LPP-ERM/KMS, EURATOM-Belgian State Association, Trilateral Euregio Cluster, Brussels (Belgium)

2011-12-23T23:59:59.000Z

365

A high etendue spectrometer suitable for core charge eXchange recombination spectroscopy on ITER  

SciTech Connect (OSTI)

A feasibility study for the use of core charge exchange recombination spectroscopy on ITER has shown that accurate measurements on the helium ash require a spectrometer with a high etendue of 1mm{sup 2}sr to comply with the measurement requirements [S. Tugarinov et al., Rev. Sci. Instrum. 74, 2075 (2003)]. To this purpose such an instrument has been developed consisting of three separate wavelength channels (to measure simultaneously He/Be, C/Ne, and H/D/T together with the Doppler shifted direct emission of the diagnostic neutral beam, the beam emission (BES) signal), combining high dispersion (0.02 nm/pixel), sufficient resolution (0.2 nm), high efficiency (55%), and extended wavelength range (14 nm) at high etendue. The combined measurement of the BES along the same sightline within a third wavelength range provides the possibility for in situ calibration of the charge eXchange recombination spectroscopy signals. In addition, the option is included to use the same instrument for measurements of the fast fluctuations of the beam emission intensity up to 2 MHz, with the aim to study MHD activity.

Jaspers, R. J. E.; Scheffer, M. [Science and Technology of Nuclear Fusion, Eindhoven University of Technology, Eindhoven (Netherlands); Kappatou, A. [FOM Institute DIFFER - Dutch Institute for Fundamental Energy Research, Association EURATOM-FOM, Nieuwegein (Netherlands); Valk, N. C. J. van der; Durkut, M.; Snijders, B. [TNO Science and Industry, P.O. Box 155, 2600 AD Delft (Netherlands); Marchuk, O.; Biel, W. [Institut fuer Energie und Klimaforschung-IEK-4 Forschungszentrum, Juelich GmbH, 52425 Juelich (Germany); Pokol, G. I. [Institute of Nuclear Techniques, Budapest University of Technology and Economics, EURATOM Association, P. O. Box 91, H-1521 Budapest (Hungary); Erdei, G. [Department of Atomic Physics, Budapest University of Technology and Economics, EURATOM Association, P. O. Box 91, H-1521 Budapest (Hungary); Zoletnik, S.; Dunai, D. [WIGNER RCP, RMKI, EURATOM Association, P. O. Box 91, H-1521 Budapest (Hungary)

2012-10-15T23:59:59.000Z

366

Global dose rate assessment in ITER diagnostics ports based on the 3-D FEM ATTILA code  

Science Journals Connector (OSTI)

The USITER, through the Princeton Plasma Physics Lab (PPPL), is responsible for the delivery of several fully integrated upper, equatorial and lower port plugs dedicated for the diagnostics in ITER. Each port plug package consists of a generic port plug structure and a set of diagnostics and diagnostic housings. The shielding design of the integrated port plugs calls for maintaining a dose level not to exceed 100 ?Sv/h inside the interspace of each port; the room behind the port plug where maintenance personnel access the rear of the port. This is set as an upper target design in order to perform routine maintenance 1E6 sec (?two weeks) following shutdown. Expensive remote handling robots and tooling are required otherwise. In this paper we present results from a parametric study aimed at providing initial assessment of the attainable dose rates in the diagnostics ports and their extension areas in order to properly address the duration time and frequency for the workers to perform the scheduled maintenance. The nuclear analysis is performed using both the serial version and the distributed memory parallel (DMP) version of the ATTILA-7.1.0, 3-D FEM Discrete Ordinates code, along with the FENDL2.1/FORNAX and ANSI/ANS-6.1.1-1977 data bases.

Mahmoud Z. Youssef; Russell E. Feder

2012-01-01T23:59:59.000Z

367

Design of Electron Cyclotron Heating and Current Drive System of ITER  

SciTech Connect (OSTI)

Since the end of EDA, the design of the Electron Cyclotron Heating and Current Drive (ECH and CD) system has been modified to respond to progress in physics understanding and change of interface conditions. Nominal RF power of 20 MW is shared by four upper launchers or one equatorial launcher RF beams are steered by front steering mirrors providing wide sweeping angle for the RF beam. DC high voltage power supply may be composed of IGBT pulse step modulators because of high frequency modulation and design flexibility to three different types of 170 GHz gyrotrons provided by three parties. The RF power from the 170 GHz gyrotron is transmitted to the launcher by 63.5 mm{phi} corrugated waveguide line and remotely switched by a waveguide switch between the upper launcher and the equatorial launcher. The ECH and CD system has also a start-up sub-system for assist of initial discharge composed of three 127.5 GHz gyrotrons and a dedicated DC high voltage power supply. Three of transmission lines are shared between 170 GHz gyrotron and 127.5 GHz gyrotron so as to inject RF beam for the start-up through the equatorial launcher. R and Ds of components for high power long pulse and mirror steering mechanism have been on-going in the parties to establish a reliable ITER ECH and CD system.

Kobayashi, N. [ITER, Cadarache (France); Bigelow, T.; Rasmussen, D. [ORNL, Oak Ridge (United States); Bonicelli, T.; Ramponi, G.; Saibene, G. [EFDA, Garching (Germany); Cirant, S. [ENEA-CNR, Milan (Italy); Denisov, G. [IAP, Nizhny Novgorod (Russian Federation); Heidinger, R.; Piosczyk, B. [FZK, Karlsruhe (Germany); Henderson, M.; Hogge, J.-P.; Thumm, M.; Tran, M. Q. [CRPP, Lausanne (Switzerland); Rao, S. L. [IPR, Bhat (India); Sakamoto, K.; Takahashi, K. [JAEA, Naka (Japan); Temkin, R. J. [MIT PSFC, Cambridge (United States); Verhoeven, A. G. A. [FOM IPP, Rijnhuizen (Netherlands); Zohm, H. [MPI IPP, Garching (Germany)

2007-09-28T23:59:59.000Z

368

Comparison of ICRF and NBI heated plasmas performances in the JET ITER-like wall  

SciTech Connect (OSTI)

During the initial operation of the JET ITER-like wall, particular attention was given to the characterization of the Ion Cyclotron Resonance Frequency (ICRF) heating in this new metallic environment. In this contribution we compare L-modes plasmas heated by ICRF or by Neutral Beam Injection (NBI). ICRF heating as expected led to a much higher centrally peaked power deposition on the electrons and due to the central fast ion population to stronger sawtooth activity. Surprisingly, although a higher bulk radiation was observed during the ICRF phase, the thermal plasma energy was found similar for both cases, showing that a higher radiation inside the separatrix was not incompatible with an efficient central heating scheme. The higher radiation was attributed to the presence Tungsten (W). Tomographic inversion of SXR emissions allowed a precise observation of the sawtooth effect on the radiation pattern. W concentration profiles deconvolved from SXR emission showed the flattening of the profiles due to sawtooth for both heating and the peaking of the profiles in the NBI case only hinting for extra transport effect in the ICRF case.

Mayoral, M.-L. [EFDA Close Support Unit, Garching, Germany and Euratom/CCFE Association, Culham Science Centre, Abingdon, OX14 3DB (United Kingdom); Pütterich, T.; Bobkov, V. [Max-Planck-Institut für Plasmaphysik, EURATOM-Assoziation, Garching (Germany); Jacquet, P. [Euratom/CCFE Association, Culham Science Centre, Abingdon, OX14 3DB (United Kingdom); Lerche, E.; Van-Eester, D.; Bourdelle, C.; Colas, L. [CEA, IRFM, F-13108 Saint-Paul-Lez-Durance (France); Czarnecka, A. [Association Euratom-IPPLM, Hery 23, 01-497 Warsaw (Poland); Mlynar, J. [Association Euratom-IPP.CR, Institute of Plasma Physics AS CR, 18200 Prague (Czech Republic); Neu, R. [EFDA Close Support Unit, Garching, Germany and Max-Planck-Institut für Plasmaphysik, EURATOM-Assoziation, Garching (Germany); Collaboration: JET-EFDA Contributors

2014-02-12T23:59:59.000Z

369

Millimeter wave experiment of ITER equatorial EC launcher mock-up  

SciTech Connect (OSTI)

The full-scale mock-up of the equatorial launcher was fabricated in basis of the baseline design to investigate the mm-wave propagation properties of the launcher, the manufacturability, the cooling line management, how to assemble the components and so on. The mock-up consists of one of three mm-wave transmission sets and one of eight waveguide lines can deliver the mm-wave power. The mock-up was connected to the ITER compatible transmission line and the 170GHz gyrotron and the high power experiment was carried out. The measured radiation pattern of the beam at the location of 2.5m away from the EL mock-up shows the successful steering capability of 20°?40°. It was also revealed that the radiated profile at both steering and fixed focusing mirror agreed with the calculation. The result also suggests that some unwanted modes are included in the radiated beam. Transmission of 0.5MW-0.4sec and of 0.12MW-50sec were also demonstrated.

Takahashi, K.; Oda, Y.; Kajiwara, K.; Kobayashi, N.; Isozaki, M.; Sakamoto, K. [Japan Atomic Energy Agency, Naka (Japan); Omori, T.; Henderson, M. [ITER Organization, St. Paul lez Durance (France)

2014-02-12T23:59:59.000Z

370

Iterative Dense Correspondence Correction Through Bundle Adjustment Feedback-Based Error Detection  

SciTech Connect (OSTI)

A novel method to detect and correct inaccuracies in a set of unconstrained dense correspondences between two images is presented. Starting with a robust, general-purpose dense correspondence algorithm, an initial pose estimate and dense 3D scene reconstruction are obtained and bundle-adjusted. Reprojection errors are then computed for each correspondence pair, which is used as a metric to distinguish high and low-error correspondences. An affine neighborhood-based coarse-to-fine iterative search algorithm is then applied only on the high-error correspondences to correct their positions. Such an error detection and correction mechanism is novel for unconstrained dense correspondences, for example not obtained through epipolar geometry-based guided matching. Results indicate that correspondences in regions with issues such as occlusions, repetitive patterns and moving objects can be identified and corrected, such that a more accurate set of dense correspondences results from the feedback-based process, as proven by more accurate pose and structure estimates.

Hess-Flores, M A; Duchaineau, M A; Goldman, M J; Joy, K I

2009-11-23T23:59:59.000Z

371

Requirements and interfaces to cryogenic and power supply plants for the ITER magnet system  

SciTech Connect (OSTI)

This paper describes the requirements and interfaces of cryogenic and power supply plants for the ITER magnet system. The heat loads and mass flow rates of the magnet system is evaluated to keep coil temperature within 6.5 K during the plasma operation of 2200 s. The helium consumption in the current leads is estimated for a current feed of 4.5 MA from 4 K to 300 K. The location of the electrical insulation breaks is compared near winding and outside of cryostat. The terminal box is designed for interfacing the cryogenic and power supply systems. Separate vacuums for the cryostat and the cryolines facilitate maintenance of all cryogenic components without warm-up of the whole system. A superconducting busbar is used to supply current from a current connector at the coil to the vapor-cooled lead in the coil terminal box. The layout of cryogenic lines and equipment is designed to consider space limitations and routing restrictions in the tokamak hall and the electrical termination building. The main parameters of the cryogenic plant (cryoplant) are discussed.

Yoshida, K.; Kalinin, V.; Stoner, S. [ITER Joint Central Team, Naka-machi, Naka-gun, Ibaraki-ken (Japan)] [and others

1996-12-31T23:59:59.000Z

372

Iterative optimizing quantization method for reconstructing three-dimensional images from a limited number of views  

DOE Patents [OSTI]

A three-dimensional image reconstruction method comprises treating the object of interest as a group of elements with a size that is determined by the resolution of the projection data, e.g., as determined by the size of each pixel. One of the projections is used as a reference projection. A fictitious object is arbitrarily defined that is constrained by such reference projection. The method modifies the known structure of the fictitious object by comparing and optimizing its four projections to those of the unknown structure of the real object and continues to iterate until the optimization is limited by the residual sum of background noise. The method is composed of several sub-processes that acquire four projections from the real data and the fictitious object: generate an arbitrary distribution to define the fictitious object, optimize the four projections, generate a new distribution for the fictitious object, and enhance the reconstructed image. The sub-process for the acquisition of the four projections from the input real data is simply the function of acquiring the four projections from the data of the transmitted intensity. The transmitted intensity represents the density distribution, that is, the distribution of absorption coefficients through the object.

Lee, Heung-Rae (Dublin, CA)

1997-01-01T23:59:59.000Z

373

Derivation of coarse-grained potentials via multistate iterative Boltzmann inversion  

E-Print Network [OSTI]

In this work, an extension to the standard iterative Boltzmann inversion (IBI) method to derive coarse-grained potentials is proposed. It is shown that the inclusion of target data from multiple states yields a less state-dependent potential, and is thus better suited to simulate systems over a range of thermodynamic states than the standard IBI method. The inclusion of target data from multiple states forces the algorithm to sample regions of potential phase space that match the radial distribution function at multiple state points, thus producing a derived potential that is more representative of the underlying potential interactions. It is shown that the algorithm is able to converge to the true potential for a system where the underlying potential is known. It is also shown that potentials derived via the proposed method better predict the behavior of n-alkane chains than those derived via the standard method. Additionally, through the examination of alkane monolayers, it is shown that the relative weight given to each state in the fitting procedure can impact bulk system properties, allowing the potentials to be further tuned in order to match the properties of reference atomistic and/or experimental systems.

Timothy C. Moore; Christopher R. Iacovella; Clare McCabe

2014-10-07T23:59:59.000Z

374

Performance evaluation approach for the supercritical helium cold circulators of ITER  

SciTech Connect (OSTI)

The ITER project design foresees Supercritical Helium (SHe) forced flow cooling for the main cryogenic components, namely, the superconducting (SC) magnets and cryopumps (CP). Therefore, cold circulators have been selected to provide the required SHe mass flow rate to cope with specific operating conditions and technical requirements. Considering the availability impacts of such machines, it has been decided to perform evaluation tests of the cold circulators at operating conditions prior to the series production in order to minimize the project technical risks. A proposal has been conceptualized, evaluated and simulated to perform representative tests of the full scale SHe cold circulators. The objectives of the performance tests include the validation of normal operating condition, transient and off-design operating modes as well as the efficiency measurement. A suitable process and instrumentation diagram of the test valve box (TVB) has been developed to implement the tests at the required thermodynamic conditions. The conceptual engineering design of the TVB has been developed along with the required thermal analysis for the normal operating conditions to support the performance evaluation of the SHe cold circulator.

Vaghela, H.; Sarkar, B.; Bhattacharya, R.; Kapoor, H. [ITER-India, Institute for Plasma Research, Near Indira Bridge, Bhat, Gandhinagar-382428 (India); Chalifour, M.; Chang, H.-S.; Serio, L. [ITER Organization, Route de Vinon sur Verdon - 13115 St Paul Lez Durance (France)

2014-01-29T23:59:59.000Z

375

Iterative Boltzmann plot method for temperature and pressure determination in a xenon high pressure discharge lamp  

SciTech Connect (OSTI)

The Boltzmann plot method allows to calculate plasma temperatures and pressures if absolutely calibrated emission coefficients of spectral lines are available. However, xenon arcs are not very well suited to be analyzed this way, as there are only a limited number of lines with atomic data available. These lines have high excitation energies in a small interval between 9.8 and 11.5 eV. Uncertainties in the experimental method and in the atomic data further limit the accuracy of the evaluation procedure. This may result in implausible values of temperature and pressure with inadmissible uncertainty. To omit these shortcomings, an iterative scheme is proposed that is making use of additional information about the xenon fill pressure. This method is proved to be robust against noisy data and significantly reduces the uncertainties. Intentionally distorted synthetic data are used to illustrate the performance of the method, and measurements performed on a laboratory xenon high pressure discharge lamp are analyzed resulting in reasonable temperatures and pressures with significantly reduced uncertainties.

Zalach, J.; Franke, St. [INP Greifswald, Felix-Hausdorff-Str. 2, 17489 Greifswald (Germany)

2013-01-28T23:59:59.000Z

376

Conceptual design and testing strategy of a dual functional lithium–lead test blanket module in ITER and EAST  

Science Journals Connector (OSTI)

A dual functional lithium–lead (DFLL) test blanket module (TBM) concept has been proposed for testing in the International Thermonuclear Experimental Reactor (ITER) and the Experimental Advanced Superconducting Tokamak (EAST) in China to demonstrate the technologies of the liquid lithium–lead breeder blankets with emphasis on the balance between the risks and the potential attractiveness of blanket technology development. The design of DFLL-TBM concept has the flexibility of testing both the helium-cooled quasi-static lithium–lead (SLL) blanket concept and the He/PbLi dual-cooled lithium–lead (DLL) blanket concept. This paper presents an effective testing strategy proposed to achieve the testing target of SLL and DLL DEMO blankets relevant conditions, which includes three parts: materials R&D and small-scale out-of-pile mockups testing in loops, middle-scale TBMs pre-testing in EAST and full-scale consecutive TBMs testing corresponding to different operation phases of ITER during the first 10 years. The design of the DFLL-TBM concept and the testing strategy ability to test TBMs for both blanket concepts in sequence and or in parallel for both ITER and EAST are discussed.

Y. Wu; the FDS Team

2007-01-01T23:59:59.000Z

377

Cost Transfers Involving Sponsored Projects Directives and Procedures  

E-Print Network [OSTI]

Cost Transfers Involving Sponsored Projects Directives and Procedures Responsible Office: Office....................................................................................................................2 1.3 Cost Transfer..................................................................................................................................................2 4. Documentation of Cost Transfers

Jawitz, James W.

378

Tri-Party Agreement Hanford Public Involvement Plan  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1 Excerpts from the Comment and Response Document on the Tri-Party Agreement Hanford Public Involvement Plan The comments submitted by the Hanford Advisory Board (Advice 251)...

379

Tri-Party Agreement Agencies Annual Hanford Public Involvement...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of 17 Tri-Party Agreement Agencies Annual Hanford Public Involvement Survey 1. How do you usually receive information about Hanford topics? (Please select all that apply) Response...

380

Public Understanding of Cleanup Levels Discussion Public Involvement...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Discussion Public Involvement Committee Meeting - Hanford Advisory Board Wednesday, October 31, 2012 - Red Lion Hanford House, Richland Page 1 of 4 Cleanup Levels One of the...

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

FOIASI - Special Inquiry Review of Allegations InvolvingPotentialMisc...  

Office of Environmental Management (EM)

Office of Environmental Management. The allegations involved potential violations of political activity restrictions, lack of impartiality in performing official duties, misuse of...

382

Industrial waste heat recovery and cogeneration involving organic Rankine cycles  

Science Journals Connector (OSTI)

This paper proposes a systematic approach for energy integration involving waste heat recovery through an organic Rankine cycle (ORC). The proposed approach is based...

César Giovani Gutiérrez-Arriaga…

2014-08-01T23:59:59.000Z

383

UNSAT-H Version 3.0: Unsaturated Soil Water and Heat Flow Model Theory, User Manual, and Examples  

SciTech Connect (OSTI)

The UNSAT-H model was developed at Pacific Northwest National Laboratory (PNNL) to assess the water dynamics of arid sites and, in particular, estimate recharge fluxes for scenarios pertinent to waste disposal facilities. During the last 4 years, the UNSAT-H model received support from the Immobilized Waste Program (IWP) of the Hanford Site's River Protection Project. This program is designing and assessing the performance of on-site disposal facilities to receive radioactive wastes that are currently stored in single- and double-shell tanks at the Hanford Site (LMHC 1999). The IWP is interested in estimates of recharge rates for current conditions and long-term scenarios involving the vadose zone disposal of tank wastes. Simulation modeling with UNSAT-H is one of the methods being used to provide those estimates (e.g., Rockhold et al. 1995; Fayer et al. 1999). To achieve the above goals for assessing water dynamics and estimating recharge rates, the UNSAT-H model addresses soil water infiltration, redistribution, evaporation, plant transpiration, deep drainage, and soil heat flow as one-dimensional processes. The UNSAT-H model simulates liquid water flow using Richards' equation (Richards 1931), water vapor diffusion using Fick's law, and sensible heat flow using the Fourier equation. This report documents UNSAT-H .Version 3.0. The report includes the bases for the conceptual model and its numerical implementation, benchmark test cases, example simulations involving layered soils and plants, and the code manual. Version 3.0 is an, enhanced-capability update of UNSAT-H Version 2.0 (Fayer and Jones 1990). New features include hysteresis, an iterative solution of head and temperature, an energy balance check, the modified Picard solution technique, additional hydraulic functions, multiple-year simulation capability, and general enhancements.

MJ Fayer

2000-06-12T23:59:59.000Z

384

Near-field/altered-zone models report  

SciTech Connect (OSTI)

The U.S. Department of Energy is studying Yucca Mountain as the possible site for the first underground repository for permanent disposal of spent fuel from commercial nuclear reactors as well as for other types high-level nuclear waste. Emplacement of high-level radioactive waste, especially commercial spent nuclear fuel (CSNF), in Yucca Mountain will release a large amount of heat into the rock above and below the repository. The heating rate will decrease with time, creating a thermal pulse. Over a period of several thousand years, the rock temperature will rise initially, then drop when the production of decay heat falls below the rate at which heat escapes from the hot zone. Besides raising the rock temperature, much of this heat will vaporize water, which will then condense in cooler regions. The condensate is likely to form a gravity-driven heat pipe above the repository, creating the possibility that water may drain back onto the waste packages (WPs) or that it may ''shed'' through the pillars between emplacement drifts. The long-term importance of these effects has been investigated through the development, testing, and application of thermohydrologic (TH) models. Other effects, such coupled chemical and mechanical processes, may also influence the movement of water above, within, and below the emplacement drifts. A recent report on thermally driven coupled processes (Hardin and Chesnut, 1997) provides a qualitative assessment of the probable significance of these processes for the Yucca Mountain Site Characterization Project (YMSCP) and is the phenomenological framework for the present report. This report describes the conceptual and numerical models that have been developed to predict the thermal, mechanical, hydrologic, and chemical responses to the cumulative heat production of the potential host rock at Yucca Mountain. As proposed, the repository horizon will be situated within the Topopah Spring tuff, in the adjacent middle nonlithophysal and lower lithophysal units. These units are made up of moderately to densely welded, devitrified, fractured tuff. The rock's chemical composition is comparable to that of typical granite, but has textural features and mineralogical characteristics of large-scale, silicic volcanism. Because the repository horizon will be approximately 300 m below the ground surface and 200 m above the water table, the repository will be partially saturated. The welded tuff matrix in the host units is highly impermeable, but water and gas flow readily through fractures. The degree of fracturing in these units is highly variable, and the hydrologic significance of fracturing is an important aspect of site investigation. This report describes the characterization and modeling of a region around the potential repository--the altered zone--a region in which the temperature will be increased significantly by waste-generated heat. Numerical simulation has shown that, depending on the boundary conditions, rock properties, and repository design features incorporated in the models, the altered zone (AZ) may extend from the water table to the ground surface. This report also describes models of the near field, the region comprising the repository emplacement drifts and the surrounding rock, which are critical to the performance of engineered components. Investigations of near-field and altered-zone (NF/AZ) processes support the design of underground repository facilities and engineered barriers and also provide constraint data for probabilistic calculations of waste-isolation performance (i.e., performance assessment). The approach to investigation, which is an iterative process involving hypothesis testing and experimentation, has relied on conceptualizing engineered barriers and on performance analysis. This report is a collection, emphasizing conceptual and numerical models, of the recent results contributed from studies of NF/AZ processes and of quantitative measures of NF/AZ performance. The selection and presentation of contributions are intended to show the iterative development of understand

Hardin, E. L., LLNL

1998-03-01T23:59:59.000Z

385

Predictions of Alpha Heating in ITER L-mode and H-mode Plasmas  

SciTech Connect (OSTI)

Predictions of alpha heating in L-mode and H-mode DT plasmas in ITER are generated using the PTRANSP code. The baseline toroidal field of 5.3 T, plasma current ramped to 15 MA and a flat electron density profile ramped to Greenwald fraction 0.85 are assumed. Various combinations of external heating by negative ion neutral beam injection, ion cyclotron resonance, and electron cyclotron resonance are assumed to start half-way up the density ramp. The time evolution of plasma temperatures and, for some cases, toroidal rotation are predicted assuming GLF23 and boundary parameters. Significant toroidal rotation and flow-shearing rates are predicted by GLF23 even in the L-mode phase with low boundary temperatures, and the alpha heating power is predicted to be significant if the power threshold for the transition to H-mode is higher than the planned total heating power. The alpha heating is predicted to be 8-76 MW in L-mode at full density. External heating mixes with higher beam injection power have higher alpha heating power. Alternatively if the toroidal rotation is predicted assuming that the ratio of the momentum to thermal ion energy conductivity is 0.5, the flow-shearing rate is predicted to have insignificant effects on the GLF23- predicted temperatures, and alpha heating is predicted to be 8-20 MW. In H-mode plasmas the alpha heating is predicted to depend sensitively on the assumed pedestal temperatures. Cases with fusion gain greater than 10 are predicted to have alpha heating greater than 80 MW.

R.V. Budny

2011-01-06T23:59:59.000Z

386

Resolution enhancement of lung 4D-CT data using multiscale interphase iterative nonlocal means  

SciTech Connect (OSTI)

Purpose: Four-dimensional computer tomography (4D-CT) has been widely used in lung cancer radiotherapy due to its capability in providing important tumor motion information. However, the prolonged scanning duration required by 4D-CT causes considerable increase in radiation dose. To minimize the radiation-related health risk, radiation dose is often reduced at the expense of interslice spatial resolution. However, inadequate resolution in 4D-CT causes artifacts and increases uncertainty in tumor localization, which eventually results in extra damages of healthy tissues during radiotherapy. In this paper, the authors propose a novel postprocessing algorithm to enhance the resolution of lung 4D-CT data. Methods: The authors' premise is that anatomical information missing in one phase can be recovered from the complementary information embedded in other phases. The authors employ a patch-based mechanism to propagate information across phases for the reconstruction of intermediate slices in the longitudinal direction, where resolution is normally the lowest. Specifically, the structurally matching and spatially nearby patches are combined for reconstruction of each patch. For greater sensitivity to anatomical details, the authors employ a quad-tree technique to adaptively partition the image for more fine-grained refinement. The authors further devise an iterative strategy for significant enhancement of anatomical details. Results: The authors evaluated their algorithm using a publicly available lung data that consist of 10 4D-CT cases. The authors' algorithm gives very promising results with significantly enhanced image structures and much less artifacts. Quantitative analysis shows that the authors' algorithm increases peak signal-to-noise ratio by 3-4 dB and the structural similarity index by 3%-5% when compared with the standard interpolation-based algorithms. Conclusions: The authors have developed a new algorithm to improve the resolution of 4D-CT. It outperforms the conventional interpolation-based approaches by producing images with the markedly improved structural clarity and greatly reduced artifacts.

Zhang Yu [School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, China and Department of Radiology and BRIC, University of North Carolina, Chapel Hill, North Carolina 27599 (United States); Yap, Pew-Thian; Wu Guorong [Department of Radiology and BRIC, University of North Carolina, Chapel Hill, North Carolina 27599 (United States); Feng Qianjin; Chen Wufan [School of Biomedical Engineering, Southern Medical University, Guangzhou 510515 (China); Lian Jun [Department of Radiation Oncology, University of North Carolina, Chapel Hill, North Carolina 27599 (United States); Shen Dinggang [Department of Radiology and BRIC, University of North Carolina, Chapel Hill, North Carolina 27599 (United States); Department of Brain and Cognitive Engineering, Korea University, Seoul 136-713 (Korea, Republic of)

2013-05-15T23:59:59.000Z

387

Two-dimensional iterative region-of-interest (ROI) reconstruction from truncated projection data  

SciTech Connect (OSTI)

A small detector or limited gantry rotation angles may cause data truncation, in which case the entire object cannot be completely reconstructed. However, a small region of interest (ROI) may be recoverable in certain truncation situations. Two analytical methods have been proposed for exact ROI reconstruction. Here we evaluate the capability of ROI reconstruction using an maximum-likelihood expectation-maximization (ML-EM) method, which directly solves the inverse problem of the system equations. ROI reconstruction using the ML-EM method is compared with that using the two analytical methods. Comparisons are based on reconstructions of four specifically designed, computer-simulated truncation cases. In the simulation, each reconstructed ROI is coupled with its counterpart in the nontruncated case to evaluate the accuracy of the reconstructed ROI. We found that, (a) in two truncation situations the ROI can be reconstructed by both the analytical methods and the two-dimensional ML-EM method, but the ML-EM method may produce a larger ROI; (b) for a truncation case that neither analytical algorithm is applicable, the ML-EM method provides a quantitative ROI reconstruction; and (c) for the well-known 'interior' truncation problem, neither the analytical methods nor the ML-EM method can perform an exact ROI reconstruction, but the ML-EM method provides informative ROI images. We also propose an analysis using the truncated projection matrix and its Moore-Penrose inverse matrix which can help to determine the recoverable ROI using iterative methods for a given truncation situation.

Zhang, B.; Zeng, G. L. [Utah Center for Advanced Imaging Research, University of Utah, Salt Lake City, Utah 84108 (United States)

2007-03-15T23:59:59.000Z

388

High-performance Computing for Topology Optimization Tailored iterative solvers for topology optimization  

E-Print Network [OSTI]

with fine resolutions, for instance for 3D printing, requires solving very large finite element models

Vuik, Kees

389

DECONTAMINATION DRESSDOWN AT A TRANSPORTATION ACCIDENT INVOLVING RADIOACTIVE MATERIAL  

Broader source: Energy.gov (indexed) [DOE]

Video User' s Guide Video User' s Guide DECONTAMINATION DRESSDOWN AT A TRANSPORTATION ACCIDENT INVOLVING RADIOACTIVE MATERIAL DISCLAIMER Viewing this video and completing the enclosed printed study material do not by themselves provide sufficient skills to safely engage in or perform duties related to emergency response to a transportation accident involving radioactive material. Meeting that goal is beyond

390

LESSONS LEARNED FROM A LANDFILL SLOPE FAILURE INVOLVING  

E-Print Network [OSTI]

LESSONS LEARNED FROM A LANDFILL SLOPE FAILURE INVOLVING GEOSYTNTHETICS Virginia L. Wilson.L. Soderman and G.P. Raymond November 12, 1998 #12;LESSONS LEARNED FROM A LANDFILL SLOPE FAILURE INVOLVING slopes at waste containment facilities. The Geneva Landfill is located near Geneva, Ohio which

391

Annual Report of the EURATOM/UKAEA Fusion Programme 2008/09 8 ITER Systems  

E-Print Network [OSTI]

optimise the plasma. These systems are based on many years experience built up in the fusion laboratories the responsibility of the new `Fusion for Energy' agency (F4E) in Barcelona. Our participation is mainly via F4E Partners at the end of this reporting period involves nuclear data production, and in particular

392

Basic features of boron isotope separation by SILARC method in the two-step iterative static model  

Science Journals Connector (OSTI)

Boron isotopes have a broad spectrum of applications in industry. Naturally occurring boron consists of two stable isotopes—19.9 % of boron-10 and 81.1 % of boron-11. A useful property of pure boron-10 isotopes a...

K. A. Lyakhov; H. J. Lee

2013-05-01T23:59:59.000Z

393

Modeling of Electron Cyclotron Heating in Large Tokamaks and ITER with the 3-D Full-Wave Code STELEC  

Science Journals Connector (OSTI)

Technical Paper / Sixteenth Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating (EC-16)

V. Vdovin

394

Public Involvement Opportunities for the DUF6 Conversion Facility EISs  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Opportunities Opportunities Public Involvement Opportunities The public comment period for the Supplement Analysis for Disposal of Depleted Uranium Oxide Conversion Product Generated from DOE's Inventory of Depleted Uranium Hexafluoride is closed. Sorry! The public comment period for the Supplement Analysis for Disposal of Depleted Uranium Oxide Conversion Product Generated from DOE's Inventory of Depleted Uranium Hexafluoride is closed. The public comment form is no longer available. For information on other public involvement opportunities, please visit Public Involvement Opportunities. Ways to Provide Comments Comments may be submitted via the Public Comment Form on this Web site. Comments can also be mailed to: DU Disposal Supplement Analysis Comment Argonne National Laboratory

395

Microsoft Word - Number of Public Involvement Deliverables _2_.doc  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Document Document Public Involvement Deliverables Number of Public Involvement Deliverables Completed In a Typical Fiscal Year * Nevada Site Office Manager Environmental Management Weekly Reports: 52 per year * DOE Headquarters Environmental Management Weekly Report: 52 per year * Fact sheets: 20 * Briefings: approximately 100 presentations per year, averaging 15 slides each * Drafting of articles for distribution/posting as EM News Flash alerts: 10-12 per year * Videos: 1 'full-length' production video (@ ~10 minutes or more): 2-3 feature production videos (@ ~2 minutes) and numerous (+150) video clips and raw video * Maintenance of the web-based Environmental Management Information System (EMIS) Public Involvement portion. Maintenance includes uploading briefings,

396

Combined iterative reconstruction and image-domain decomposition for dual energy CT using total-variation regularization  

SciTech Connect (OSTI)

Purpose: Dual-energy CT (DECT) is being increasingly used for its capability of material decomposition and energy-selective imaging. A generic problem of DECT, however, is that the decomposition process is unstable in the sense that the relative magnitude of decomposed signals is reduced due to signal cancellation while the image noise is accumulating from the two CT images of independent scans. Direct image decomposition, therefore, leads to severe degradation of signal-to-noise ratio on the resultant images. Existing noise suppression techniques are typically implemented in DECT with the procedures of reconstruction and decomposition performed independently, which do not explore the statistical properties of decomposed images during the reconstruction for noise reduction. In this work, the authors propose an iterative approach that combines the reconstruction and the signal decomposition procedures to minimize the DECT image noise without noticeable loss of resolution. Methods: The proposed algorithm is formulated as an optimization problem, which balances the data fidelity and total variation of decomposed images in one framework, and the decomposition step is carried out iteratively together with reconstruction. The noise in the CT images from the proposed algorithm becomes well correlated even though the noise of the raw projections is independent on the two CT scans. Due to this feature, the proposed algorithm avoids noise accumulation during the decomposition process. The authors evaluate the method performance on noise suppression and spatial resolution using phantom studies and compare the algorithm with conventional denoising approaches as well as combined iterative reconstruction methods with different forms of regularization. Results: On the Catphan©600 phantom, the proposed method outperforms the existing denoising methods on preserving spatial resolution at the same level of noise suppression, i.e., a reduction of noise standard deviation by one order of magnitude. This improvement is mainly attributed to the high noise correlation in the CT images reconstructed by the proposed algorithm. Iterative reconstruction using different regularization, including quadratic orq-generalized Gaussian Markov random field regularization, achieves similar noise suppression from high noise correlation. However, the proposed TV regularization obtains a better edge preserving performance. Studies of electron density measurement also show that our method reduces the average estimation error from 9.5% to 7.1%. On the anthropomorphic head phantom, the proposed method suppresses the noise standard deviation of the decomposed images by a factor of ?14 without blurring the fine structures in the sinus area. Conclusions: The authors propose a practical method for DECT imaging reconstruction, which combines the image reconstruction and material decomposition into one optimization framework. Compared to the existing approaches, our method achieves a superior performance on DECT imaging with respect to decomposition accuracy, noise reduction, and spatial resolution.

Dong, Xue; Niu, Tianye; Zhu, Lei, E-mail: leizhu@gatech.edu [Nuclear and Radiological Engineering and Medical Physics Programs, The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 (United States)] [Nuclear and Radiological Engineering and Medical Physics Programs, The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 (United States)

2014-05-15T23:59:59.000Z

397

DOE Involvement in Consensus Negotiations for Energy Conservation Standards  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Involvement in Consensus Negotiations for Energy Conservation Involvement in Consensus Negotiations for Energy Conservation Standards DOE Involvement in Consensus Negotiations for Energy Conservation Standards DOE Involvement in Consensus Negotiations for Energy Conservation Standards. The Department of Energy is supportive of outside parties' negotiations efforts to reach consensus on energy conservation standards and test procedures that can be presented for consideration by the Department However, neither the Department nor any of its contractors can: offer advice or suggestion on any standard or test procedure under consideration by outside parties; take a position on any standard or test procedure under consideration by outside parties; negotiate with outside parties; or participate in any way in discussions among outside parties.

398

Cognitive Control Involved in Overcoming Prepotent Response Tendencies and  

E-Print Network [OSTI]

Cognitive Control Involved in Overcoming Prepotent Response Tendencies and Switching Between Tasks, USA, 2 Center for the Neural Basis of Cognition, Pittsburgh, PA 15213, USA and 3 University, parietal, task switching, conflict effect, preparation Introduction Cognitive control comprises several

Wainwright, Peter C.

399

EXISTENCE OF SOLUTIONS TO A NONLINEAR PROBLEM INVOLVING ISOTROPIC DEFORMATIONS  

E-Print Network [OSTI]

EXISTENCE OF SOLUTIONS TO A NONLINEAR PROBLEM INVOLVING ISOTROPIC DEFORMATIONS ANA CRISTINA BARROSO manuscript, published in "Journal of Nonlinear Systems and Applications (2010) ?" #12;2 ANA CRISTINA BARROSO

Paris-Sud XI, Université de

400

Electromagnetic Inverse Problems Involving Distributions of Dielectric Mechanisms and Parameters  

E-Print Network [OSTI]

Electromagnetic Inverse Problems Involving Distributions of Dielectric Mechanisms and Parameters H University, Raleigh, NC 27695-8205 August 17, 2005 Abstract We consider electromagnetic interrogation, uniform, log-normal, and log-Bi-Gaussian distributions. Keywords: Electromagnetic interrogation

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they are not comprehensive nor are they the most current set.
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to obtain the most current and comprehensive results.


401

OpenEI:Get Involved | Open Energy Information  

Open Energy Info (EERE)

OpenEI:Get Involved OpenEI:Get Involved Jump to: navigation, search How to GET INVOLVED WITH OpenEI Get involved with OpenEI Easy Ways You Can Get Involved Beginner.jpg Newbie Are you new to OpenEI, but not sure how to get started? That's ok! Its easy to get involved and contribute to OpenEI. Sign up for an account then start contributing wiki content Use social media to help share the word about OpenEI Join a local energy or technology interest group Scientist.jpg Content Developer Are you interested in adding, contributing, and editing content on OpenEI? Find out how to create and grow OpenEI's content and contribute. Create a New Page Upload Dataset - txt, zip, xml, csv, xls, xlsx, doc, docx, pdf, json, cbwfdb format Upload File - png, gif, jpg, jpeg, pdf, ppt, pptx format Join an OpenEI Project - OpenEI projects tackle specific challenges

402

Cabibbo-suppressed nonleptonic B and D decays involving tensor mesons  

Science Journals Connector (OSTI)

The Cabibbo-suppressed nonleptonic decays of B (and D) mesons to final states involving tensor mesons are computed using the nonrelativistic quark model of Isgur, Scora, Grinstein, and Wise with the factorization hypothesis. We find that some of these B decay modes, such as B?(K*,D*)D2*, can have branching ratios as large as 6×10-5, which seems to be at the reach of future B factories.

J. H. Muńoz; A. A. Rojas; G. López Castro

1999-03-10T23:59:59.000Z

403

Report on International Collaboration Involving the FE Heater and HG-A Tests at Mont Terri  

E-Print Network [OSTI]

March Report on International Collaboration Involving the FEReport on International Collaboration Involving the FEviii Report on International Collaboration Involving the FE

Houseworth, Jim

2014-01-01T23:59:59.000Z

404

Emergency Response to a Transportation Accident Involving Radioactive  

Broader source: Energy.gov (indexed) [DOE]

Response to a Transportation Accident Involving Response to a Transportation Accident Involving Radioactive Material Emergency Response to a Transportation Accident Involving Radioactive Material The purpose of this User's Guide is to provide instructors with an overview of the key points covered in the video. The Student Handout portion of this Guide is designed to assist the instructor in reviewing those points with students. The Student Handout should be distributed to students after the video is shown and the instructor should use the Guide to facilitate a discussion on each response disciplines' activities or duties at the scene. During this discussion, the instructor can present response scenarios, each of which would have a different discipline arriving first at the accident scene. The purpose of this discussion

405

Get Involved with Home Energy Score | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Residential Buildings » Home Energy Score » Get Involved with Residential Buildings » Home Energy Score » Get Involved with Home Energy Score Get Involved with Home Energy Score The Department of Energy's (DOE) Home Energy Score helps homeowners understand the energy performance of their homes and how they compare to other homes nationwide. Energy professionals and organizations can use the Score to promote energy efficiency to homeowners and encourage investments in energy improvements. Information for Homeowners Information for Interested Organizations Information for Interested Assessors Highlights Home Energy Scoring Tool Updated Home Energy Scoring Tool v.2014 features improved calculation methodology, user interface and mobility on the 10-point scale. Visit the Research and Background webpage and DOE's Progress Alert to learn more.

406

GC GUIDANCE ON BARTER TRANSACTIONS INVOLVING DOE-OWNED URANIUM  

Broader source: Energy.gov (indexed) [DOE]

GC GUIDANCE ON BARTER TRANSACTIONS INVOLVING DOE-OWNED URANIUM GC GUIDANCE ON BARTER TRANSACTIONS INVOLVING DOE-OWNED URANIUM The Department of Energy has on a variety of occasions engaged in transactions under which it bartered uranium to which it has title for goods or services . This guidance memorializes the results of analyses previously directed to individual proposed transactions . For the reasons discussed below, we conclude that the Atomic Energy Act of 1954' , as amended, (AEA), authorizes such barter transactions. Background : DOE Barter Transactions In a number of instances, DOE has engaged in transactions involving the barter of DOE-owned uranium2 in exchange for various products or services. For example, DOE entered into a transaction with the United States Enrichment Corporation (USEC), under which USEC would

407

08/17/2006 12:09 PMOak Ridge National Laboratory -U.S. ITER Project Completes Management Team Page 1 of 2http://www.ornl.gov/ornlhome/print/press_release_print.cfm?ReleaseNumber=mr20060817-00  

E-Print Network [OSTI]

the nation's course for one of the largest energy-science projects in history," Sauthoff said. "Each member08/17/2006 12:09 PMOak Ridge National Laboratory - U.S. ITER Project Completes Management Team Page Sauthoff, head of the U.S. ITER Project Office at Oak Ridge National Laboratory. "This team will help chart

408

Please cite this article in press as: F. Xu, et al., On the efficiency of iterative ordered subset reconstruction algorithms for acceleration on GPUs, Comput. Methods Programs Biomed. (2009), doi:10.1016/j.cmpb.2009.09.003  

E-Print Network [OSTI]

Computed tomography Commodity graphics hardware GPU a b s t r a c t Expectation Maximization (EM) and the Simultaneous Iterative Reconstruction Technique (SIRT) are two iterative computed tomography reconstruction of the projection data. This has given rise to the method of Ordered Subsets EM (OS-EM) and the Simultaneous

Mueller, Klaus

409

Coupling Air Flow Models to Load/Energy Models and Implications for  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Coupling Air Flow Models to Load/Energy Models and Implications for Coupling Air Flow Models to Load/Energy Models and Implications for Envelope Component Testing and Modeling Speaker(s): Brent Griffith Date: July 30, 2002 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Dariush Arasteh Air models allow accounting for air temperature variations within a thermal zone or along the surface of an envelope component. A recently completed ASHRAE research project (RP-1222) produced a source code toolkit focused on coupling airflow models to load routines typical of whole building energy simulation. The two modeling domains are computed separately (and iteratively) with relevant temperature boundary conditions passed back and forth. One of the air models in the toolkit is a new contribution to crude/fast airflow modeling that is based on solving the Euler equation

410

A comparison of iterative methods to solve complex valued linear algebraic systems  

E-Print Network [OSTI]

, electromagnetism, structural dynamics, electrical power system models, wave propagation, magnetized multicomponent.axelsson@it.uu.se Department of Information Technology, Uppsala University, Sweden, maya.neytcheva@it.uu.se King Abdulaziz

Flener, Pierre

411

A Drug Toxicity Death Involving Propylhexedrine and Mitragynine  

Science Journals Connector (OSTI)

......toxicity urine Substance Abuse Detection methods Substance-Related...Tandem Mass Spectrometry Young Adult A death involving abuse of propylhexedrine and...decedent's computer and internet usage history indicated...and CEDIA for drugs of abuse. A full-scan (m......

Justin M. Holler; Shawn P. Vorce; Pamela C. McDonough-Bender; Joseph Magluilo; Jr.; Carol J. Solomon; Barry Levine

2011-01-01T23:59:59.000Z

412

Emerging Trends in Failures Involving EPS-Block Geofoam Fills  

E-Print Network [OSTI]

Emerging Trends in Failures Involving EPS-Block Geofoam Fills John S. Horvath, Ph.D., P.E., M.ASCE1 Abstract: Expanded polystyrene EPS is a closed-cell polymeric "plastic" foam that, in its generic block is due to the fact that block-molded EPS is unique among geofoam products for the large and diverse

Horvath, John S.

413

Evolution, biodiversity, taxonomy Polymorphism of eps loci involved in exopolysaccharide  

E-Print Network [OSTI]

Evolution, biodiversity, taxonomy Polymorphism of eps loci involved in exopolysaccharide synthesis ORFs and five copies of three insertion sequences (IS) types belonging to the eps locus and ORFs sequences from Lactococcus lactis. Further- more, sequence comparison of eps loci of three S

Paris-Sud XI, Université de

414

GUIDELINES FOR CAPITAL PROJECTS INVOLVING DONOR CAMPUS REVIEW  

E-Print Network [OSTI]

. The Accounting Manual addresses appropriation and expenditure of donor funds for capital projects and is attachedGUIDELINES FOR CAPITAL PROJECTS INVOLVING DONOR FUNDS CAMPUS REVIEW Capital projects, regardless capital projects, including donor-funded projects, must have a Building Committee appointed

California at Santa Barbara, University of

415

Incident involving UCSD student(s) takes place. UCSD STUDENT  

E-Print Network [OSTI]

Incident involving UCSD student(s) takes place. UCSD STUDENT CONDUCT PROCESS for individual students (updated 9/20/11) The Office of Student Conduct receives an incident report (i.e. RA, RSO, UCSD Police, student/faculty/staff complaint, etc). If sufficient evidence is present to support a violation

Russell, Lynn

416

1 INTRODUCTION The use of geosynthetics in modern landfills involves  

E-Print Network [OSTI]

1 INTRODUCTION The use of geosynthetics in modern landfills involves important roles because systems for landfills typically include both geosynthetics and earthen material components, (e-established components of the landfill industry. The state of the art on the use of geosynthetics in waste containment

Zornberg, Jorge G.

417

Collaboration Networks Involving Humanitarian Organisations -Particular Problems for a Particular  

E-Print Network [OSTI]

Collaboration Networks Involving Humanitarian Organisations - Particular Problems for a Particular operation to another, and so do the collaboration modes. One thing is always true thought: for each disaster, collaboration networks are implemented on both global and local levels. Yet, lack of collaboration is often

Paris-Sud XI, Université de

418

Validation of the Electrical Properties of the ITER ICRF Antenna using Reduced-Scale Mock-Ups  

SciTech Connect (OSTI)

Experimental measurements on reduced-scale mock-ups allow validating the electrical properties and RF numerical optimization of the ITER ICRF antenna. Frequency response in the different regions of the antenna is described and key parameters for performance improvement are given. Coupling is improved by acting on the front-face geometry (strap width, antenna box depth and vertical septa recess). The 4-port junction acts as a frequency filter and together with the service stub performs pre-matching in the whole frequency band. Influence of the Faraday screen on coupling is limited. The effect of voltage limitation on the maximum total radiated power is given. The importance of a good decoupling network and of grounding is emphasized. Finally the control of the antenna wave spectrum is performed by implementing feedback controlled load-resilient matching and decoupling options and control algorithms are tested.

Dumortier, Pierre; Durodie, Frederic; Grine, Djamel; Kyrytsya, Volodymyr; Louche, Fabrice; Messiaen, Andre; Vervier, Michel; Vrancken, Mark [LPP-ERM/KMS, EURATOM-Belgian State Association, CYCLE, Trilateral Euregio Cluster, B-1000 Brussels (Belgium)

2011-12-23T23:59:59.000Z

419

Approximate solutions of a time-fractional diffusion equation with a source term using the variational iteration method  

E-Print Network [OSTI]

We consider a time fractional differential equation of order $\\alpha$, $0 0, t > 0, \\quad c(x,0)=f(x). $$ where ${}^C_0\\mathcal{D}_t^{\\alpha}$ is the Caputo fractional derivative of order $\\alpha$, $A$ is a linear differential operator, $q(x,t)$ is a source term, and $f(x)$ is the inital condition. Approximate (truncated) series solutions are obtained by means of the Variational Iteration Method (VIM). We find the series solutions for different cases of the source term, in a form that is readily implementable on the computer where symbolic computation platform is available. The error in truncated solution $c_n$ diminishes exponentially fast for a given $\\alpha$ as the number of terms in the series increases. VIM has several advantages over other methods that produce solutions in the series form. The truncated VIM solutions often converge rapidly requiring only a few terms for fast and accurate approximations.

Iftikhar Ali; Bilal Chanane; Nadeem A. Malik

2014-07-31T23:59:59.000Z

420

Comparison of Nb/sub 3/Sn and NbTi superconductor magnet ITER (International Thermonuclear Experimental Reactor) devices  

SciTech Connect (OSTI)

The TETRA tokamak systems code is used to compare designs for the International Thermonuclear Experimental Reactor (ITER) that use Nb/sub 3/Sn and NbTi superconductor magnets. Similar minimum-cost devices are found with both types of conductors when superfluid helium (He-2) is used in conjunction with the NbTi. The cost of using NbTi with He-1 cooling is much higher than that of using Nb/sub 3/Sn or NbTi with He-2 cooling. Generally, the minimum-cost devices occur for peak fields at the toroidal field coil of about 11.5-13 T, depending on the physics requirements. Sensitivities to the allowable stress level indicate strong cost increases when the stress is reduced from the nominal 600-MPa level and weaker cost benefits when the stress is allowed to reach higher levels. 8 refs., 5 figs., 1 tab.

Galambos, J.D.; Peng, Y.K.M.; Reid, R.L.; Lubell, M.S.; Dresner, L.; Miller, J.R.

1988-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

A perspective on sustained marine observations for climate modelling and prediction  

Science Journals Connector (OSTI)

...of the surge on coastal buildings and infrastructure. On longer forecast time scales of weeks...iterative approach that effectively creates hybrid observed-model covariances. These...The finer resolution of the ORCA025 grid (a) is eddy permitting and allows for...

2014-01-01T23:59:59.000Z

422

Towards a high order Fourier-SEM solver of fluid models in tokamaks  

E-Print Network [OSTI]

and energy expressed for both ions and elec- trons and on the assumption of quasi-neutrality of the plasma fluid (ions and electrons) numerical model. 1.1 Introduction The production of energy by fusion of light gradient and curvature effects. The ITER device is presently under construction in Cadarache (France) [17

Pasquetti, Richard

423

Accurate model-based high resolution cardiac image reconstruction in dual source CT  

Science Journals Connector (OSTI)

Cardiac imaging represents one of the most challenging imaging problems, requiring high spatial and temporal resolutions along with good tissue contrast. One of the newest clinical cardiac CT scanners incorporates two source-detector pairs in order to ... Keywords: cardiac, dual source CT, iterative method, model-based imaging

Synho Do; Sanghee Cho; W. Clem Karl; Mannudeep K. Kalra; Thomas J. Brady; Homer Pien

2009-06-01T23:59:59.000Z

424

Evaluation of an integrated Knowledge Discovery and Data Mining process model  

Science Journals Connector (OSTI)

Data Mining projects are implemented by following the knowledge discovery process. This process is highly complex and iterative in nature and comprises of several phases, starting off with business understanding, and followed by data understanding, data ... Keywords: Analytical testing, CRISP-DM, Evaluation, IKDDM, Knowledge Discovery and Data Mining (KDDM) process models

Sumana Sharma; Kweku-Muata Osei-Bryson; George M. Kasper

2012-10-01T23:59:59.000Z

425

Neutrinoless ?? decay transition matrix elements within mechanisms involving light Majorana neutrinos, classical Majorons, and sterile neutrinos  

Science Journals Connector (OSTI)

In the projected-Hartree-Fock-Bogoliubov (PHFB) model, uncertainties in the nuclear transition matrix elements for the neutrinoless double-? decay of 94,96Zr, 98,100Mo, 104Ru, 110Pd, 128,130Te, and 150Nd isotopes within mechanisms involving light Majorana neutrinos, classical Majorons, and sterile neutrinos are statistically estimated by considering sets of 16 (24) matrix elements calculated with four different parametrizations of the pairing plus multipolar type of effective two-body interaction, two sets of form factors, and two (three) different parametrizations of Jastrow type of short-range correlations. In the mechanisms involving the light Majorana neutrinos and classical Majorons, the maximum uncertainty is about 15% and in the scenario of sterile neutrinos, it varies in between approximately 4 (9)%–20 (36)% without(with) Jastrow short range correlations with the Miller-Spencer parametrization, depending on the considered mass of the sterile neutrinos.

P. K. Rath, R. Chandra, K. Chaturvedi, P. Lohani, P. K. Raina, and J. G. Hirsch

2013-12-20T23:59:59.000Z

426

Advanced Tokamak Modes and ITER D. M. Meade, W. M. Nevins, D. J. Sigmar, T. C. Simonen, W. M. Stacey and K. I. Thomassen  

E-Print Network [OSTI]

1 Advanced Tokamak Modes and ITER D. M. Meade, W. M. Nevins, D. J. Sigmar, T. C. Simonen, W. M. Stacey and K. I. Thomassen I . Introduction In view of the accumulating evidence from tokamak experiments and theory that advanced tokamak modes of operation have achieved higher values of confinement, beta

427

Multi-start iterated local search for the periodic vehicle routing problem with time windows and time spread constraints on services  

Science Journals Connector (OSTI)

In the field of high-value shipment transportation, companies are faced to the malevolence problem. The risk of ambush increases with the predictability of vehicle routes. This paper addresses a very hard periodic vehicle routing problem with time windows, ... Keywords: Iterated local search, Periodic vehicle routing, Security constraints, Time window

Julien Michallet; Christian Prins; Lionel Amodeo; Farouk Yalaoui; Grégoire Vitry

2014-01-01T23:59:59.000Z

428

White Paper for Massive Gas Injection studies in NSTX-U in support of ITER research University of Washington (19 July 2012)  

E-Print Network [OSTI]

White Paper for Massive Gas Injection studies in NSTX-U in support of ITER research University of Washington (19 July 2012) 1/2 White Paper@aa.washington.edu , Jarboe@aa.washington.edu , dstotler@pppl.gov, tabrams@pppl.gov This white paper describes

429

A E Costley, US/ITER Town meeting, San Diego, 22 April 2004 N 55 IP 57 04-04-30 F 1 International Thermonuclear Experimental Reactor  

E-Print Network [OSTI]

for the integration have been developed and the interfaces with the re to their anticipated operational role (machine protection, control and physics studies). About 45 parameters in total). These are included in the highest level ITER design requirement document (DRG 1). · For each parameter

430

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 38, NO. 4, JULY 2000 1843 An Iterative Approach to Multisensor Sea Ice  

E-Print Network [OSTI]

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 38, NO. 4, JULY 2000 1843 An Iterative play a critical role in the global climate, the remote sensing community has had a keen interest in the variability of polar sea ice characteris- tics. Sea ice influences heat transfer between the warmer ocean

Long, David G.

431

Iterative receivers for OFDM systems with dispersive fading and frequency offset  

E-Print Network [OSTI]

. Further work is then extended to space-time block coded (STBC) OFDM system. At last, the technique is applied to STBC-OFDM system through a newly built channel model, which is based on a physical description of the propagation environment. The performance...

Liu, Hui

2004-09-30T23:59:59.000Z

432

PPPL3152 Preprint Date: December 1995, UC420, 421, 427 TRANSP Simulations of ITER Plasmas  

E-Print Network [OSTI]

. Effects of high­energy neutral beam injection, sawteeth mixing, toroi­ dal field ripple, and helium ash is used to model the high­energy neutral beam injection, sawteeth effects, toroidal field ripple effects Physics Laboratory P. O. Box 451, Princeton NJ, 08543 Abstract The TRANSP code is used to construct

433

Direct-method SAD phasing with partial-structure iteration: towards automation  

Science Journals Connector (OSTI)

Structure fragments resulting from automatic model building based on initial direct-method SAD phasing are fed back to the direct-method probability formula in order to strengthen the phasing power and to benefit the automation of structure solution of proteins.

Wang, J.W.

2004-10-20T23:59:59.000Z

434

A New, Iterative, Synchronous-Response Algorithm for Analyzing the Morton Effect  

E-Print Network [OSTI]

............................................................................................................51 xi Page Figure 37 Morton Effect response ??max versus ? for different viscosities .....................52 Figure 38 Real cross section of the turbo-expander [21] ................................................53 Figure 39 XLTRC2... model of the turbo-expander ...........................................................53 Figure 40 First forward damped critical mode shape of turbo-expander ........................54 Figure 41 Unstable divergent behavior of spiral plot...

Saha, Rohit

2012-02-14T23:59:59.000Z

435

Feature - Argonne involved with proposed Green Fuels Depot in Naperville  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

involved in Naperville's proposed Green Fuels Depot involved in Naperville's proposed Green Fuels Depot Naperville's proposed Green Fuels Depot The proposed Green Fuels Depot would produce renewable fuels for Naperville's vehicle fleet. Using grass clippings to power next-generation vehicles - now that's green transportation. This is one of the ideas being considered at Naperville's newly proposed Green Fuels Depot. The project, which will require $4 million in funding to get started, would bring together Argonne National Laboratory, the city of Naperville, Packer Engineering and the College of DuPage for an innovative plan to produce renewable energy. "It's a golden opportunity for Argonne to be associated with one of our neighboring communities in promoting new technologies that we have pioneered here at the laboratory," said Glenn Keller, manager of vehicle

436

Voluntary Associations and Their Involvement in Collaborative Forest Management  

E-Print Network [OSTI]

in environmental issues has led to a wave of environmental legislation enacted to mandate stakeholder identification and involvement in natural resource planning in United States. Signed in 1970, the National Environmental Policy Act (NEPA) is the most... influential and far-reaching law that requires federal agencies to integrate environmental values into their decision making processes by providing environmental impact statements (EIS) available for public comment. NEPA, as well as other significant pieces...

Lu, Jiaying

2012-02-14T23:59:59.000Z

437

Involving children in meal preparation. Effects on food intake  

Science Journals Connector (OSTI)

Abstract The question of how to promote healthy eating habits in children is relevant because most children do not meet the recommended vegetable intake. Involving children in food preparation could be an opportunity to develop healthy eating behaviors and to increase vegetable consumption. The purpose of this study was to examine the effect of children's involvement in meal preparation on their food and vegetable intake. A between-subject experiment was conducted with 47 children aged 6 to 10 years. In condition 1 (n?=?25), children prepared a lunch meal (pasta, breaded chicken, cauliflower, and salad) with the assistance of a parent. In condition 2 (n?=?22), the meal was prepared by the parent alone. Independent samples t-tests were conducted to compare intake in the “child cooks” and “parent cooks” conditions. Children in the child cooks condition ate significantly more salad 41.7?g (76.1%), more chicken 21.8?g (27.0%), and more calories 84.6 ?kcal (24.4%) than children in the parent cooks condition. Between before cooking and directly after cooking the meal, children in the child cooks condition reported significantly increased feelings of valence (feeling positive) and dominance (feeling in control). This study confirms that involving children in meal preparation can increase vegetable intake. Because of the potential effect on energy intake, parents need to be made aware of appropriate portion sizes for their children. Taking this into account, encouraging parents to involve their children in the preparation of healthy and balanced meals could be a valuable intervention strategy to improve the diets and vegetable intake of children.

Klazine van der Horst; Aurore Ferrage; Andreas Rytz

2014-01-01T23:59:59.000Z

438

Analysis and computer tools for separation processes involving nonideal mixtures  

SciTech Connect (OSTI)

The objectives of this research, were to continue to further both the theoretical understanding of and the development of computer tools (algorithms) for separation processes involving nonideal mixtures. These objectives were divided into three interrelated major areas -- the mathematical analysis of the number of steady-state solutions to multistage separation processes, the numerical analysis of general, related fixed-point methods, and the development and implementation of computer tools for process simulation.

Lucia, A.

1992-05-01T23:59:59.000Z

439

Advances in Bayesian Model Based Clustering Using Particle Learning  

SciTech Connect (OSTI)

Recent work by Carvalho, Johannes, Lopes and Polson and Carvalho, Lopes, Polson and Taddy introduced a sequential Monte Carlo (SMC) alternative to traditional iterative Monte Carlo strategies (e.g. MCMC and EM) for Bayesian inference for a large class of dynamic models. The basis of SMC techniques involves representing the underlying inference problem as one of state space estimation, thus giving way to inference via particle filtering. The key insight of Carvalho et al was to construct the sequence of filtering distributions so as to make use of the posterior predictive distribution of the observable, a distribution usually only accessible in certain Bayesian settings. Access to this distribution allows a reversal of the usual propagate and resample steps characteristic of many SMC methods, thereby alleviating to a large extent many problems associated with particle degeneration. Furthermore, Carvalho et al point out that for many conjugate models the posterior distribution of the static variables can be parametrized in terms of [recursively defined] sufficient statistics of the previously observed data. For models where such sufficient statistics exist, particle learning as it is being called, is especially well suited for the analysis of streaming data do to the relative invariance of its algorithmic complexity with the number of data observations. Through a particle learning approach, a statistical model can be fit to data as the data is arriving, allowing at any instant during the observation process direct quantification of uncertainty surrounding underlying model parameters. Here we describe the use of a particle learning approach for fitting a standard Bayesian semiparametric mixture model as described in Carvalho, Lopes, Polson and Taddy. In Section 2 we briefly review the previously presented particle learning algorithm for the case of a Dirichlet process mixture of multivariate normals. In Section 3 we describe several novel extensions to the original implementation of Carvalho et al that allow us to retain the computational advantages of particle learning while improving the suitability of the methodology to the analysis of streaming data and simultaneously facilitating the real time discovery of latent cluster structures. Section 4 demonstrates our methodological enhancements in the context of several simulated and classical data sets, showcasing the use of particle learning methods for online anomaly detection, label generation, drift detection, and semi-supervised classification, none of which would be achievable through a standard MCMC approach. Section 5 concludes with a discussion of future directions for research.

Merl, D M

2009-11-19T23:59:59.000Z

440

Fusion materials science and technology research opportunities now and during the ITER era  

SciTech Connect (OSTI)

Several high-priority near-term potential research activities to address fusion nuclear science challenges are summarized. General recommendations include: (1) Research should be preferentially focused on the most technologically advanced options (i.e., options that have been developed at least through the singleeffects concept exploration stage, technology readiness levels >3), (2) Significant near-term progress can be achieved by modifying existing facilities and/or moderate investment in new medium-scale facilities, and (3) Computational modeling for fusion nuclear sciences is generally not yet sufficiently robust to enable truly predictive results to be obtained, but large reductions in risk, cost and schedule can be achieved by careful integration of experiment and modeling.

S.J. Zinkle; J.P. Planchard; R.W. Callis; C.E. Kessel; P.J. Lee; K.A. McCarty; Various Others

2014-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Fusion Materials Science and Technology Research Opportunities now and during the ITER Era  

SciTech Connect (OSTI)

Several high-priority near-term potential research activities to address fusion nuclear science challenges are summarized. General recommendations include: 1) Research should be preferentially focused on the most technologically advanced options (i.e., options that have been developed at least through the single-effects concept exploration stage, Technology Readiness Levels >3), 2) Significant near-term progress can be achieved by modifying existing facilities and/or moderate investment in new medium-scale facilities, and 3) Computational modeling for fusion nuclear sciences is generally not yet sufficiently robust to enable truly predictive results to be obtained, but large reductions in risk, cost and schedule can be achieved by careful integration of experiment and modeling.

Zinkle, Steven J.; Blanchard, James; Callis, Richard W.; Kessel, Charles E.; Kurtz, Richard J.; Lee, Peter J.; Mccarthy, Kathryn; Morley, Neil; Najmabadi, Farrokh; Nygren, Richard; Tynan, George R.; Whyte, Dennis G.; Willms, Scott; Wirth, Brian D.

2014-02-22T23:59:59.000Z

442

Ideal site-mixing applied to solutions involving coupled substitution  

Science Journals Connector (OSTI)

...the solution and Raoultian/Henri an at the other extreme of the so lution: model d is non-Raoultian/non-Henrian for Xcel = 0 and Raoultian/Henrian for Xcei = 1, and models e, f, and g are non-Raoultian/non-Henrian for Xcei = 1 and Raoultian...

Madis Roots

443

Quality function development: a new paradigm for involving customers in product development process  

Science Journals Connector (OSTI)

The success of new products is determined particularly by the extent to which the producer succeeds in developing products that meet consumer demands. This implies that product development has to be fast in order to incorporate the latest trends in the product. Over the last few years an impressive body of research has accumulated on the topic of product development and the purpose of this article is to synthesise and to assess our understanding of involving users in the development process. In this paper, an attempt is made not only to analyse existing models of product development but also introduces an integrated concept and methodology to address these issues. The paper is composed of product development background, related literature review and list of steps for model development. The concepts presented in this paper are not yet widely practiced. Nevertheless, this work integrates several theories and practices into a useful framework.

J.R. Sharma; A.M. Rawani

2009-01-01T23:59:59.000Z

444

involves mass transfer from the primary to the According to this binary model, during the  

E-Print Network [OSTI]

is a non-evolved star such as the Sun: it is at an evolutionary stage during which nuclear- fusion laser light and seeing a reproducible effect of this stimulus on the behaviour of the mouse. It sounds

Schnitzer, Mark

445

The antidepressant-like effect of fisetin involves the serotonergic and noradrenergic system  

Science Journals Connector (OSTI)

Flavonoids, which are polyphenolic compounds, have been reported to possess remarkable antioxidant and anti-inflammatory activities. Among the dietary flavonoids, fisetin (3,3?,4?,7-tetrahydroxyflavone) possesses a significant spectrum of biochemical and pharmacological actions. The present study aimed to investigate the antidepressant potential of fisetin and its possible mechanism. Two mouse models of despair tests were used to evaluate the antidepressant-like effect of fisetin. The results suggested that fisetin (10 and 20 mg/kg, p.o.) dose dependently inhibited the immobility time in both behavioral tests, while the doses that affected the immobile response did not affect locomotor activity. Two behavioral models, reserpine-induced hypothermia and ptosis, and p-chlorophenylalanine (PCPA)-induced depletion of serotonin, were used to explore the possible involvement of fisetin in the noradrenergic and serotonergic system. The higher dose of fisetin was found to effectively antagonize the hypothermia, but not ptosis, induced by reserpine. Pre-treatment with PCPA abolished the anti-immobility effect of fisetin in the forced swimming and tail suspension tests. Moreover, neurochemical assays showed that fisetin produced an increase in serotonin and noradrenaline levels in the frontal cortex and hippocampus. Monoamine oxidase (MAO) activity in the mouse brain was inhibited by 14.7% after treatment with fisetin, while MAO-B activity was not affected. These findings indicate that the antidepressant-like effect of fisetin involves the regulation of the central serotonin and noradrenaline levels.

Linlin Zhen; Jiejin Zhu; Xin Zhao; Wu Huang; Yiran An; Shan Li; Xia Du; Mengmeng Lin; Qiandong Wang; Ying Xu; Jianchun Pan

2012-01-01T23:59:59.000Z

446

Report on International Collaboration Involving the FE Heater and HG-A Tests at Mont Terri  

SciTech Connect (OSTI)

Nuclear waste programs outside of the US have focused on different host rock types for geological disposal of high-level radioactive waste. Several countries, including France, Switzerland, Belgium, and Japan are exploring the possibility of waste disposal in shale and other clay-rich rock that fall within the general classification of argillaceous rock. This rock type is also of interest for the US program because the US has extensive sedimentary basins containing large deposits of argillaceous rock. LBNL, as part of the DOE-NE Used Fuel Disposition Campaign, is collaborating on some of the underground research laboratory (URL) activities at the Mont Terri URL near Saint-Ursanne, Switzerland. The Mont Terri project, which began in 1995, has developed a URL at a depth of about 300 m in a stiff clay formation called the Opalinus Clay. Our current collaboration efforts include two test modeling activities for the FE heater test and the HG-A leak-off test. This report documents results concerning our current modeling of these field tests. The overall objectives of these activities include an improved understanding of and advanced relevant modeling capabilities for EDZ evolution in clay repositories and the associated coupled processes, and to develop a technical basis for the maximum allowable temperature for a clay repository. The R&D activities documented in this report are part of the work package of natural system evaluation and tool development that directly supports the following Used Fuel Disposition Campaign (UFDC) objectives: ? Develop a fundamental understanding of disposal-system performance in a range of environments for potential wastes that could arise from future nuclear-fuel-cycle alternatives through theory, simulation, testing, and experimentation. ? Develop a computational modeling capability for the performance of storage and disposal options for a range of fuel-cycle alternatives, evolving from generic models to more robust models of performance assessment. For the purpose of validating modeling capabilities for thermal-hydro-mechanical (THM) processes, we developed a suite of simulation models for the planned full-scale FE Experiment to be conducted in the Mont Terri URL, including a full three-dimensional model that will be used for direct comparison to experimental data once available. We performed for the first time a THM analysis involving the Barcelona Basic Model (BBM) in a full three-dimensional field setting for modeling the geomechanical behavior of the buffer material and its interaction with the argillaceous host rock. We have simulated a well defined benchmark that will be used for codeto- code verification against modeling results from other international modeling teams. The analysis highlights the complex coupled geomechanical behavior in the buffer and its interaction with the surrounding rock and the importance of a well characterized buffer material in terms of THM properties. A new geomechanical fracture-damage model, TOUGH-RBSN, was applied to investigate damage behavior in the ongoing HG-A test at Mont Terri URL. Two model modifications have been implemented so that the Rigid-Body-Spring-Network (RBSN) model can be used for analysis of fracturing around the HG-A microtunnel. These modifications are (1) a methodology to compute fracture generation under compressive stress conditions and (2) a method to represent anisotropic elastic and strength properties. The method for computing fracture generation under compressive load produces results that roughly follow trends expected for homogeneous and layered systems. Anisotropic properties for the bulk rock were represented in the RBSN model using layered heterogeneity and gave bulk material responses in line with expectations. These model improvements were implemented for an initial model of fracture damage at the HG-A test. While the HG-A test model results show some similarities with the test observations, differences between the model results and observations remain.

Houseworth, Jim; Rutqvist, Jonny; Asahina, Daisuke; Chen, Fei; Vilarrasa, Victor; Liu, Hui-Hai; Birkholzer, Jens

2013-11-06T23:59:59.000Z

447

THE CRYOPLANT FOR THE ITER NEUTRAL BEAM TEST FACILITY TO BE BUILT AT RFX IN PADOVA, ITALY  

SciTech Connect (OSTI)

The Neutral Beam Test Facility (NBTF), planned to be constructed in Padua (Italy), will constitute the prototype of the two Neutral Beam Injectors (NBI), which will be installed in the ITER plant (Cadarache-France). The NBTF is composed of a 1 MV accelerator that can produce a 40 A deuteron pulsed neutral beam particles. The necessary vacuum needed in the accelerator is achieved by two large cryopumps, designed by FZK-Karlsruhe, with radiation shields cooled between 65 K and 90 K and with cryopanels cooled by 4 bar supercritical helium (ScHe) between 4.5 K and 6.5 K. A new cryoplant facility will be installed with two large helium refrigerators: a Shield Refrigerator (SR), whose cooling capacity is up to 30 kW between 65 K and 90 K, and a helium Main Refrigerator (MR), whose equivalent cooling capacity is up to 800 W at 4.5 K. The cooling of the cryopanels is obtained with two (ScHe) 30 g/s pumps (one redundant), working in a closed cycle around 4 bar producing a pressure head of 100 mbar. Two heat exchangers are immersed in a buffer dewar connected to the MR. The MR and SR different operation modes are described in the paper, as well as the new cryoplant installation.

Pengo, R. [INFN-LNL, Viale dell'Universita 2, I-35020 Legnaro, Padova (Italy); Fellin, F. [Consorzio RFX, 35127 Camin, Padova (Italy); Sonato, P. [Consorzio RFX, 35127 Camin, Padova (Italy); Dipartimento d'Ingegneria Elettrica dell'Universita' di Padova, 35100 Padova (Italy)

2010-04-09T23:59:59.000Z

448

Effect of the minority concentration on ion cyclotron resonance heating in presence of the ITER-like wall in JET  

SciTech Connect (OSTI)

The most recent JET campaign has focused on characterizing operation with the 'ITER-like' wall. One of the questions that needed to be answered is whether the auxiliary heating methods do not lead to unacceptably high levels of impurity influx, preventing fusion-relevant operation. In view of its high single pass absorption, hydrogen minority fundamental cyclotron heating in a deuterium plasma was chosen as the reference wave heating scheme in the ion cyclotron domain of frequencies. The present paper discusses the plasma behavior as a function of the minority concentration X[H] in L-mode with up to 4MW of RF power. It was found that the tungsten concentration decreases by a factor of 4 when the minority concentration is increased from X[H] ? 5% to X[H] % 20% and that it remains at a similar level when X[H] is further increased to 30%; a monotonic decrease in Beryllium emission is simultaneously observed. The radiated power drops by a factor of 2 and reaches a minimum at X[H] ? 20%. It is discussed that poor single pass absorption at too high minority concentrations ultimately tailors the avoidance of the RF induced impurity influx. The edge density being different for different minority concentrations, it is argued that the impact ICRH has on the fate of heavy ions is not only a result of core (wave and transport) physics but also of edge dynamics and fueling.

Van Eester, D.; Lerche, E.; Crombé, K.; Jachmich, S. [LPP-ERM/KMS, Association Euratom-Belgian State, TEC Partner, Brussels (Belgium); Jacquet, P.; Graham, M.; Kiptily, V.; Matthews, G.; Mayoral, M.-L.; Mc Cormick, K.; Monakhov, I.; Noble, C.; Rimini, F.; Solano, E. R. [Euratom-CCFE Fusion Association, Culham Science Centre (United Kingdom); Bobkov, V.; Maggi, C.; Neu, R.; Pütterich, T. [MPI für Plasmaphysik Euratom Assoziation, Garching (Germany); Czarnecka, A. [Institute of Plasma Physics and Laser Microfusion, Warsaw (Poland); Coenen, J. W. [IEK-4, EURATOM-FZJ, TEC Partner, Jülich (Germany); and others

2014-02-12T23:59:59.000Z

449

Power requirements for electron cyclotron current drive and ion cyclotron resonance heating for sawtooth control in ITER  

E-Print Network [OSTI]

13MW of electron cyclotron current drive (ECCD) power deposited inside the q = 1 surface is likely to reduce the sawtooth period in ITER baseline scenario below the level empirically predicted to trigger neo-classical tearing modes (NTMs). However, since the ECCD control scheme is solely predicated upon changing the local magnetic shear, it is prudent to plan to use a complementary scheme which directly decreases the potential energy of the kink mode in order to reduce the sawtooth period. In the event that the natural sawtooth period is longer than expected, due to enhanced alpha particle stabilisation for instance, this ancillary sawtooth control can be provided from > 10MW of ion cyclotron resonance heating (ICRH) power with a resonance just inside the q = 1 surface. Both ECCD and ICRH control schemes would benefit greatly from active feedback of the deposition with respect to the rational surface. If the q = 1 surface can be maintained closer to the magnetic axis, the efficacy of ECCD and ICRH schemes sig...

Chapman, I T; Sauter, O; Zucca, C; Asunta, O; Buttery, R J; Coda, S; Goodman, T; Igochine, V; Johnson, T; Jucker, M; La Haye, R J; Lennholm, M; Contributors, JET-EFDA

2013-01-01T23:59:59.000Z

450

E-Print Network 3.0 - adenylating enzymes involved Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

enzymes involved Search Powered by Explorit Topic List Advanced Search Sample search results for: adenylating enzymes involved Page: << < 1 2 3 4 5 > >> 1 Improvement of DNA...

451

Estimation of the recycled power associated with the cryogenic refrigeration power of a fusion reactor based on TORE SUPRA experiment and ITER design  

Science Journals Connector (OSTI)

The refrigeration power associated with the superconducting magnets and cryopumps of a steady-state fusion reactor is not negligible. The power has to be minimized because it plays a role in the power station global efficiency and in the required amplification factor Q. On the one hand, the long plasma discharges obtained in December 2003 on TORE SUPRA give an insight of the cryogenic losses that might be expected for a steady-state fusion reactor equipped with superconducting magnets. The superfluid bath of the windings in TORE SUPRA allows a simple calorimetric estimation of the cryogenic losses through the temperature evolution of the bath during the long discharge. The different kinds of losses in TORE SUPRA are estimated, discussed and explained. Not all of them will be present in a real reactor. On the other hand, in the framework of ITER preparation, the magnet system and the associated refrigerator have been dimensioned taking into account again all kinds of cold losses. This exercise is important because ITER, by its size, could be relevant to the steady-state reactor situation regarding refrigeration. Based on TORE SUPRA experiment and ITER design it is, therefore, possible to propose for the first time a preliminary figure for the cryoplant power of a steady-state reactor. The order of magnitude of the cryoplant power is ten times lower than that of the fusion reactor recycled power which can be considered acceptable.

J.L. Duchateau; J.Y. Journeaux; F. Millet

2006-01-01T23:59:59.000Z

452

State Traffic Safety Information - Fatal Crashes Involving Speeding : Iowa  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Iowa Iowa (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving Speeding : Iowa (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet

453

Overview of the 2012 IECC and DOE's Involvement  

Broader source: Energy.gov (indexed) [DOE]

ENERGY CODES ENERGY CODES energycodes.gov BUILDING ENERGY CODES Overview of the 2012 IECC and DOE's Involvement Pam Cole Building Energy Codes Program Pacific Northwest National Laboratory BUILDING ENERGY CODES energycodes.gov * 1980's through 2006 - Minimum codes were truly minimal - DOE pushed for marginal improvements (1% to 3% per cycle) - DOE proposed (successfully) a major rewrite of the IECC in 2004 (became the 2006 IECC)-emphasis was format, not stringency * 2009 to Present..... - Things are getting more serious The World of Codes BUILDING ENERGY CODES energycodes.gov * Summary of changes - ~30% better than 2006 IECC - Major changes * Consolidated with IRC energy chapter (actually a change to the IRC, not the IECC) * Mandatory whole-house pressure test * More stringent duct leakage test

454

State Traffic Safety Information - Fatal Crashes Involving a Large Truck :  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Indiana (2007-2009) Indiana (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving a Large Truck : Indiana (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness

455

State Traffic Safety Information - Fatal Crashes Involving a Large Truck :  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Idaho (2007-2009) Idaho (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving a Large Truck : Idaho (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet

456

Accurate Numerical Simulations Of Chemical Phenomena Involved in Energy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Visualization of the spin density from the excess electron cluster. Robert Visualization of the spin density from the excess electron cluster. Robert Harrison Accurate Numerical Simulations Of Chemical Phenomena Involved in Energy Production and Storage with MADNESS and MPQC PI Name: Robert Harrison PI Email: harrisonrj@ornl.gov Institution: ORNL Allocation Program: ESP Allocation Hours at ALCF: 150 Million Year: 2010 to 2013 Research Domain: Chemistry Researchers propose to focus on the problems of catalysis and heavy element chemistry for fuel reprocessing-both of which are of immediate interest to the Department of Energy (DOE), are representative of a very broad class of problems in chemistry, and demand the enormous computational resources anticipated from the next generation of leadership computing facilities. Also common to both is the need for accurate electronic structure

457

State Traffic Safety Information - Fatal Crashes Involving Speeding :  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Kansas (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving Speeding : Kansas (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet

458

State Traffic Safety Information - Fatal Crashes Involving Speeding : Maine  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Maine Maine (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving Speeding : Maine (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet

459

State Traffic Safety Information - Fatal Crashes Involving Speeding :  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Illinois (2007-2009) Illinois (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving Speeding : Illinois (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet

460

State Traffic Safety Information - Fatal Crashes Involving a Large Truck :  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Hawaii (2007-2009) Hawaii (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving a Large Truck : Hawaii (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

State Traffic Safety Information - Fatal Crashes Involving a Large Truck :  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Delaware (2007-2009) Delaware (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving a Large Truck : Delaware (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness

462

State Traffic Safety Information - Fatal Crashes Involving Speeding :  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Hawaii (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving Speeding : Hawaii (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet

463

State Traffic Safety Information - Fatal Crashes Involving a Large Truck :  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

District of Columbia (2007-2009) District of Columbia (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving a Large Truck : District of Columbia (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility

464

DOE and Public Involvement A Key to Successful Clean Up  

SciTech Connect (OSTI)

The combination of two vital elements in the Oak Ridge, TN area are the Department of Energy and the education of the public, at any age, of the necessary work that is and has been going on this region of the country since the setting aside of land during the World War II era. A wide variety of interested citizens from surrounding counties make up a group of individuals that bring different elements of education and involvement to form a committee of whose interest is the Department of Energy's handling of contaminated material. The effort of one of the committees on this board has given the public a resource of material to develop a better understanding of the history and stewardship efforts taking place at the Oak Ridge Reservation. (authors)

Sarten, S. [Member of the Oak Ridge Specific Site Advisory Board, Oak Ridge, Tennessee, Owner R S Construction and Fabrication, Lenoir City, TN (United States)

2008-07-01T23:59:59.000Z

465

Coupling Lattice Boltzmann and Molecular Dynamics models for dense fluids  

E-Print Network [OSTI]

We propose a hybrid model, coupling Lattice Boltzmann and Molecular Dynamics models, for the simulation of dense fluids. Time and length scales are decoupled by using an iterative Schwarz domain decomposition algorithm. The MD and LB formulations communicate via the exchange of velocities and velocity gradients at the interface. We validate the present LB-MD model in simulations of flows of liquid argon past and through a carbon nanotube. Comparisons with existing hybrid algorithms and with reference MD solutions demonstrate the validity of the present approach.

A. Dupuis; E. M. Kotsalis; P. Koumoutsakos

2006-10-27T23:59:59.000Z

466

Decoupling and Utility Business Model Resources  

Broader source: Energy.gov [DOE]

Energy efficiency measures result in decreased energy use, which may be contrary to a utility whose business model involves increasing revenue through increased energy demand.

467

Analytical Modeling | Open Energy Information  

Open Energy Info (EERE)

Analytical Modeling Analytical Modeling Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Analytical Modeling Details Activities (1) Areas (1) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Data and Modeling Techniques Exploration Sub Group: Modeling Techniques Parent Exploration Technique: Modeling Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Analytical Modeling: A mathematical modeling technique used for simulating, explaining, and making predictions about the mechanisms involved in complex physical processes. Other definitions:Wikipedia Reegle Introduction Analytical models are mathematical models that have a closed form solution. Or in other words the solution to the equations used to describe changes in

468

Flexible modelling and support of interrelated decisions  

Science Journals Connector (OSTI)

Decision problems often consist of numerous smaller decisions that are aggregated and interrelated while spanning multiple domains, paradigms, and/or perspectives. Therefore, the decision making process should be structured in such a flexible and iterative manner that enables a range of structured to unstructured decisions to be considered, built and solved in an appropriate manner. We propose and implement a framework and architecture that uses the three pillars of flexibility in decision making (sequential, parallel, convergence, and interwoven), versatility (of paradigm and/or domain), and independence of components (value, dimension, and purpose) to support the decision making process and the entire modelling lifecycle.

Angela Liew; David Sundaram

2009-01-01T23:59:59.000Z

469

Surreptitious involvement of a metallacycle substituent in metal-mediated alkyne cleavage chemistry  

Science Journals Connector (OSTI)

Surreptitious involvement of a metallacycle substituent in metal-mediated alkyne cleavage chemistry ...

Joseph M. O'Connor; Lin Pu

1990-11-01T23:59:59.000Z

470

TRANSPORT INVOLVING CONDUCTING FIBERS IN A NON-CONDUCTING MATRIX  

E-Print Network [OSTI]

result is a material with high electrical conductivity and low thermal conductivity. Transport Models,2 , J. Rozen3 Introduction Thermal and electrical transport through a low-conductivity matrix containing conversion devices high electrical conductivity and low thermal conductivity are preferred for superior

Walker, D. Greg

471

OSPREY Model  

SciTech Connect (OSTI)

The absence of industrial scale nuclear fuel reprocessing in the U.S. has precluded the necessary driver for developing the advanced simulation capability now prevalent in so many other countries. Thus, it is essential to model complex series of unit operations to simulate, understand, and predict inherent transient behavior and feedback loops. A capability of accurately simulating the dynamic behavior of advanced fuel cycle separation processes will provide substantial cost savings and many technical benefits. The specific fuel cycle separation process discussed in this report is the off-gas treatment system. The off-gas separation consists of a series of scrubbers and adsorption beds to capture constituents of interest. Dynamic models are being developed to simulate each unit operation involved so each unit operation can be used as a stand-alone model and in series with multiple others. Currently, an adsorption model has been developed within Multi-physics Object Oriented Simulation Environment (MOOSE) developed at the Idaho National Laboratory (INL). Off-gas Separation and REcoverY (OSPREY) models the adsorption of off-gas constituents for dispersed plug flow in a packed bed under non-isothermal and non-isobaric conditions. Inputs to the model include gas, sorbent, and column properties, equilibrium and kinetic data, and inlet conditions. The simulation outputs component concentrations along the column length as a function of time from which breakthrough data is obtained. The breakthrough data can be used to determine bed capacity, which in turn can be used to size columns. It also outputs temperature along the column length as a function of time and pressure drop along the column length. Experimental data and parameters were input into the adsorption model to develop models specific for krypton adsorption. The same can be done for iodine, xenon, and tritium. The model will be validated with experimental breakthrough curves. Customers will be given access to OSPREY to used and evaluate the model.

Veronica J. Rutledge

2013-01-01T23:59:59.000Z

472

Personnel involved in nuclear standards development: 1980 directory  

SciTech Connect (OSTI)

The development of nuclear standards is an active and necessary endeavor that is concerned with the safe, orderly, and economic development of nuclear potential. There are almost 4100 people from the teachnical community who are presently involved either in writing nuclear standards, including codes, or in the management and processing roles necessary for their approval and promulgation. This document identifies the current participation of each individual as member, chairman, cochairman (vice-chairman), or secretary of about 700 standards development committees and groups. The standards committees and groups are identified with the organizations that are responsible for the preparation, review, and maintenance of the standards and that provide support through supervisory committees and headquarters staff. This directory includes four major sections: personnel, employers, committees, and a Key-Word-in-Context (KWIC) Index of committee titles. It can also be used to identify the participation of employers as well as to recognize the contributions of individuals to the often interdisciplinary activity of standards development.

Carr, S.J. (ed.)

1980-03-01T23:59:59.000Z

473

Polo-like Kinase I is involved in Invasion through Extracellular Matrix  

SciTech Connect (OSTI)

Polo-like kinase 1, PLK1, has important functions in maintaining genome stability and is involved in regulation of mitosis. PLK1 is up regulated in many invasive carcinomas. We asked whether it may also play a role in acquisition of invasiveness, a crucial step in transition to malignancy. In a model of metaplastic basal-like breast carcinoma progression, we found that PLK1 expression is necessary but not sufficient to induce invasiveness through laminin-rich extracellular matrix. PLK1 mediates invasion via Vimentin and {beta}1 integrin, both of which are necessary. We observed that PLK1 phosphorylates Vimentin on serine 82, which in turn regulates cell surface levels of {beta}1 integrin. We found PLK1 to be also highly expressed in pre-invasive in situ carcinomas of the breast. These results support a role for the involvement of PLK1 in the invasion process and point to this pathway as a potential therapeutic target for pre-invasive and invasive breast carcinoma treatment.

Bissell, Mina J; Rizki, Aylin; Mott, Joni D.; Bissell, Mina J

2008-04-02T23:59:59.000Z

474

MULTIOBJECTIVE OPTIMIZATION POWER GENERATION SYSTEMS INVOLVING CHEMICAL LOOPING COMBUSTION  

SciTech Connect (OSTI)

Integrated Gasification Combined Cycle (IGCC) system using coal gasification is an important approach for future energy options. This work focuses on understading the system operation and optimizing it in the presence of uncertain operating conditions using ASPEN Plus and CAPE-OPEN compliant stochastic simulation and multiobjective optimization capabilities developed by Vishwamitra Research Institute. The feasible operating surface for the IGCC system is generated and deterministic multiobjective optimization is performed. Since the feasible operating space is highly non-convex, heuristics based techniques that do not require gradient information are used to generate the Pareto surface. Accurate CFD models are simultaneously developed for the gasifier and chemical looping combustion system to characterize and quantify the process uncertainty in the ASPEN model.

Juan M. Salazar; Urmila M. Diwekar; Stephen E. Zitney

2009-01-01T23:59:59.000Z

475

Electroweak corrections to decays involving a charged Higgs boson  

Science Journals Connector (OSTI)

We present complete one-loop radiative corrections to the decay rate of a top quark into a charged Higgs boson and a bottom quark, and for the decay of a charged Higgs boson into leptons. The results are discussed in the framework of the two-Higgs-boson extension of the standard model suggested by supersymmetry. The effect of electroweak corrections after exclusion of universal corrections ?r is found to decrease the partial width of the top quark typically by 5%.

Andrzej Czarnecki

1993-12-01T23:59:59.000Z

476

NREL: Technology Deployment - Project Development Model  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Project Development Model Project Development Model NREL developed the Project Development Model to evaluate the risks and investment decisions required for successful renewable energy project development. The two-phase iterative model includes elements in project fundamentals and project development based off commercial project development practices supported by tools such as pro formas and checklists. Project Fundamentals or BEPTC(tm) Renewable Energy Project Development Tool For help with the BEPTC phase of your project, check out the Renewable Energy Project Development Tool, developed by NREL for U.S. Department of Energy's Community Renewable Energy Deployment effort. The tool helps you quickly establish the key motivators and feasibility of your project. Strong project fundamentals and an understanding of how a project fits

477

Challenges in plasma edge fluid modelling  

Science Journals Connector (OSTI)

Plasma fluid models like B2, UEDGE or EDGE2D are the standard tools for simulation of scrape-off layer physics, both for design and experimental support. The concept of a numerical tokamak, aiming at a predictive code for ITER, triggers the need to re-assess the available tools and their necessary extensions. These additional physics issues will be summarized. The experience existing in other scientific fields with multi-scale problems and modelling should be used as a guide. Here, the coupling strategies are in particular of interest for fusion problems. As a consequence, a certain construction of integrated modelling codes is needed: depending on the specific problem, models allowing different levels of complexity will be needed. Therefore, a hierarchy of tools is necessary, which will be discussed.

R Schneider; A Runov

2007-01-01T23:59:59.000Z

478

A GIS-LIKE TRAINING ALGORITHM FOR LOG-LINEAR MODELS WITH HIDDEN Georg Heigold, Thomas Deselaers, Ralf Schluter, and Hermann Ney  

E-Print Network [OSTI]

A GIS-LIKE TRAINING ALGORITHM FOR LOG-LINEAR MODELS WITH HIDDEN VARIABLES Georg Heigold, Thomas with Generalized Iterative Scal- ing (GIS). GIS offers, upon others, the immediate advantages that it is locally convergent, completely parameter free, and guarantees an improvement of the criterion in each step. GIS

Deselaers, Thomas

479

Object Oriented Modeling of a Multiple-Input Multiple-Output Flyback Converter in Nicholas D. Benavides and Patrick L.Chapman  

E-Print Network [OSTI]

Object Oriented Modeling of a Multiple-Input Multiple-Output Flyback Converter in Dymola Nicholas D not lend itself to many traditional circuit simulators such as SPICE. The state equations of a converter dependent on the states, and cannot be determined prior to simulation, requiring the use of an iterative

Chapman, Patrick

480

Exhibit 1C Patent Rights Retention by the Seller ITER UT-B Contracts Div Page 1 of 5  

E-Print Network [OSTI]

utilized and that its benefits are, to the extent permitted by law or Government regulations, available" and "agency regulations concerning the licensing of Government-owned inventions" mean the Department of Energy involved in Government procurement and subcontracting at 13 CFR 121.3-8 and 13 CFR 121.3-12, respectively

Pennycook, Steve

Note: This page contains sample records for the topic "model involves iterative" from the National Library of EnergyBeta (NLEBeta).
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481

US ITER | Media Corner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to find an optimal method. This impregnation process also entails research on the viscosity of the three-component resin system. The VPI of the large magnets with epoxy may...

482

US ITER | Media Corner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Fueling Lab has been at the center of design and testing of plasma fueling systems for tokamak research applications for decades. Since the mid-1970s, lab researchers have been...

483

US ITER | Media Corner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

fusion machine, will have a plasma volume more than 10 times that of the next largest tokamak, JET. Plasma disruptions that can occur in a tokamak when the plasma becomes unstable...

484

US ITER | Media Corner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

an efficient way of fitting all of these tools into a limited number of shielded ports that will protect the delicate diagnostic hardware and other parts of the machine from...

485

US ITER | Jobs  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Kelli Kizer Subcontract Administrator Tell us about your background Kelli Kizer Kelli Kizer I was born in Knoxville, Tennessee, attended Lenoir City High School, then studied and...

486

US ITER | Media Corner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Cryogenic deuterium machine gun corrals edgy plasma Cryogenic deuterium machine gun corrals edgy plasma -Agatha Bardoel Published May 3, 2012 Cryogenic deuterium machine gun...

487

US ITER | About  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Food Food Oak Ridge and Knoxville offer a variety of places to dine out. Knoxville, being a larger city, has more variety. Check the Oak Ridge Convention and Visitors Bureau for...

488

US ITER | About  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

cryopumps, service vacuum, and cryostat. This system will utilize a matrix of pump trains with various technologies to match specific vacuum system requirements, including...

489

US ITER | About  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Transportation Transportation Taxi and limousine service is available from the Knoxville airport to Oak Ridge and Knoxville hotels. Because a taxi may not be available when you...

490

US ITER | Media Corner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of Wisconsin. Superconducting strand is cabled at New England Wire Technologies on 2.5 meter wide by 2 meter tall spools before shipment to Florida for conductor jacketing. Photo:...

491

US ITER | Doing Business  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Projected Date Estimate POC WBS 1.3.1.1.3 Prototype Scroll Pumps February 2015 >500K Kelly West luckettwestk@ornl.gov 865-576-6880 WBS 1.3.1.3 Initial Cask and Piping Design...

492

US ITER - Why Fusion?  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

US Fusion Research Sites US Fusion Research Sites DOE Office of Science: US Fusion Energy Sciences Program Fusion Power Associates General Atomics DIIII-D National Fusion Facility...

493

INSIDE: ITER Site Progress  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

strand, and fabricating a toroidal field insert coil to verify the JADA TF conductor. The United States has also assumed responsibility for the disruption mitigation system, which...

494

US ITER Progress  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

expansion unit prototype permits expansion and contraction during cycles. An ORNL twin-screw extruder prototype that can provide continuous frozen deuterium for fueling and...

495

Iterative Antirandom Testing  

Science Journals Connector (OSTI)

Antirandom testing is a variation of pure random testing, which is the process of generating random patterns and applying it to a system under test (both software systems and hardware systems). However, research studies have shown that pure random testing ... Keywords: Antirandom test, Fault coverage, Maximal minimal hamming distance, Random tests

Ireneusz Mrozek; Vyacheslav N. Yarmolik

2012-06-01T23:59:59.000Z

496

Iterative Antirandom Testing  

Science Journals Connector (OSTI)

Another approach to generate antirandom tests was presented in [33...]. It is called as Scalable Test Pattern Generation (STPG). Unlike pure antirandom method of the...33] introduced scalable generation method of...

Ireneusz Mrozek; Vyacheslav N. Yarmolik

2012-06-01T23:59:59.000Z

497

INSIDE: ITER Site Progress  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

compliant manner. The persons in these positions have the responsibility to exercise broad management judgment consistent with the Project Manager's direction in coordinating...

498

US ITER Vendor Information  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Construction - Terrazzo, Tile, Marble, and Mosaic Work Construction - Water, Sewer, Pipeline, and Communications and Power Line Electronic and Other Electrical Equipment...

499

US ITER | Media Corner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

System (TCWS) Toroidal Field Coil Conductor (TF) Vacuum Auxiliary System and Roughing Pumps (VAS) Diagnostics Steady State Electrical Network (SSEN) Pellet Injection (PI)...

500

US ITER | Media Corner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Haines, as non-nuclear systems division director, will oversee the magnet systems, vacuum components and roughing pumping systems, steady state electrical power system, and...